My invention-composition for the fourth grade

In daily study, work or life, everyone will be exposed to writing. According to different genres, writing can be divided into narrative, expository, practical and argumentative. Do you know how to write a good composition? The following is my invention-grade four composition, which I carefully arranged, for reference only, hoping to help everyone.

My invention-the composition for the fourth grade 1 has come to 20xx in a blink of an eye. That year, in order to invent a pair of glasses-super smart glasses, I became a Nobel Prize winner.

The first function of this pair of glasses adopts the technology of "autofocus adjustment". In other words, when the owner's myopia increases or decreases, it is not necessary to change the glasses, just let the glasses scan the eyes and it will automatically adjust.

Its second function is advanced, which changes it from a pair of glasses to a "personal butler". Before going out every day, it will scan the owner's whole body, check if there is anything missing, and give tips. When the owner is walking on the road, if a thief comes to steal something, the glasses will immediately shoot a "weak bullet" at the thief to make him surrender.

Another function of this pair of glasses is also very advanced, that is, you can look up information anytime and anywhere. If you find a new word outside, just stare at it for five seconds and your eyes will see the information of the new word. In addition, it can also be networked to navigate for you and introduce you to some classic, quite small computers.

"Have you finished your composition?" A call in my ear pulled me back from 20xx to 20xx. It turned out to be a dream of Conan! However, I still hope that in the future, I can invent such a pair of glasses to benefit people with myopia.

My Invention-Composition 2 for Grade Four In the 2 1 century, I was already a famous scientist in the universe, and every household was using my magical invention. After using it, everyone clapped their hands and praised my brain for being extremely clever.

Everyone lives and works in peace and contentment, and everyone's life is getting better and better: in spring, everything is full of vitality and bacteria are constantly multiplying. People use my medical robot to make themselves strong and will not be crushed by bacteria; In summer, the children use my ice cream copier. Just choose your favorite taste and press the "copy" button, you can feast your eyes and keep the ice cream around forever. Autumn is full of fruits, and the farmer uncle uses my fruit robot. This robot can not only help farmers to pick fruits from towering trees, but also copy fruits. As long as there is a fruit or a seed, thousands of fruits can be produced, and there will be no exhaust gas. On the contrary, it will make the farmer's uncle turn from a sad face to a laugh. In winter, the family sat in the house talking and laughing, next to a well-dressed and elegant stove robot. This robot is not comparable to ordinary robots. It has joys and sorrows, and when it is hot, people can feel the warm and bright sunshine around it, making this winter like spring, and walking there is like walking there with the sun.

But my inventions are more than that. There are at least hundreds of millions of my inventions. If there are many, there may be at least 5.6 billion inventions, of which 5.999 won the Nobel Prize. It's just that I think my most proud invention is the universal machine, because this universal machine can be turned into anything you want at will, meet all your requirements and ensure that you don't steal, rob or cheat.

My invention-Grade 4 Composition 3 My invention, the multifunctional electric fan, has many inconveniences in people's lives.

For example, when the weather is hot in summer, you will be exhausted and sweaty when you get home. If you turn on an ordinary electric fan, it will still blow hot air when the temperature is high in summer. It is cold in winter, and some families don't have air conditioning, so it will be very cold at home. ...

At present, I have invented an advanced multifunctional electric fan. Let me tell you its purpose:

When the weather is hot in summer, just go home and say "air conditioning" to the multifunctional electric fan. The multifunctional electric fan began to operate, releasing cold air. Soon, the room was as cool as autumn. You can also save money on air conditioners. This is killing two birds with one stone.

In winter, the weather is very cold, people don't want to go out and don't want to get up in the morning. They hid in the quilt. At this time, they used the multifunctional electric fan I invented, which was much more convenient. I pointed the electric fan at you and said, "Hot air." In ten minutes, your home will be as warm as spring.

This is also purposeful. If liquefied gas leaks at home, it will make a strange sound, reminding the owner to open the window as soon as possible to let the air convection and eliminate the danger.

The multifunctional electric fan consists of magnets, blades and shafts, and is controlled by sound. It has no plug and can be moved at will. It only needs a small high-energy battery, which can be used for about a week on a single charge.

Multifunctional electric fans can't be successful in a day or two. It will take a lot of time and energy, but I will finish it. My favorite work-multifunctional electric fan will certainly bring convenience to people's lives.

My invention-Composition 4 for Grade Four Whenever I cut onions, I often shed tears and confuse myself. It's really hard! But what can we do? It suddenly occurred to me that I should wear glasses in class, because I am nearsighted and can't see the blackboard. If you can change your glasses into plastic glasses, you don't have to cry when you cut onions! So I found some plastic for packaging, scissors and rulers, and double-sided tape. I first put the ruler on the plastic, then picked up the scissors, carefully cut it off, and then stuck the cut plastic part of the glasses with double-sided tape, that's it! I couldn't wait to put it on, but I heard a hiss, ah! My newly invented glasses are rotten. What a waste of my brain! I was in great pain. I rushed into the room and lay in bed listlessly ... I don't know when a fruit wrapping paper skin suddenly attacked my head. I picked it up and seemed to understand something ... yeah! If you stick the paper cover on the glasses frame, it won't make the glasses strong. Is it stereoscopic? At first, I cut the paper cover to the size of a picture frame, then stuck the cut paper cover on the accessories of plastic glasses and painted it with color. As I thought, the glasses are really strong. I tried to see them in Daley, not to mention how happy I was, and they were very stylish!

Cutting onions will not shed tears, which is convenient and environmentally friendly. With the help of plastic glasses, our life is more colorful!

Life is getting better and better now. Bicycles become cars and squares become buildings. But in this prosperous scene, there are also some disharmonies: carbon dioxide emitted from automobile exhaust pipes, people also cut down trees indiscriminately, forests become deserts, and without trees, how can the air be fresh?

I have seen this phenomenon not once or twice. I decided to invent two kinds of machines as long as possible. A Screaming Trees recycling machine, made of nano-materials, is about the size of a dictionary, and it can still glow at night. It is not only beautiful, but also practical. Anything made of wood can turn waste into treasure. For example, if you put three pieces of waste paper at the entrance and press the "Paper" button, it will become a blank sheet of paper in less than 10 second. If you put an unnecessary wooden pen container and press the "pen" button, it will become two pencils after processing. Of course, there are many functions, such as: wooden chopsticks will become paper and wooden chairs will become paper.

My second invention is a carbon dioxide absorber. Although this machine is only the size of a palm, don't underestimate it! It's also made of nano, and the equipment inside is rubbish. But after treatment, it can be placed in the exhaust pipe of the car, blocked, and then connected with a red button. When you start the car, it also starts to work. It has two small mouths in front to absorb carbon dioxide, and two small mouths in the back to absorb oxygen from carbon dioxide and discharge it. Moreover, there is no noise when the car is used. After use, put it under the tree and press the green button, and it will release carbon dioxide for the tree to absorb. It will be discharged in two or three minutes, and it will also absorb a lot of oxygen. Pressing King Wong at home can release oxygen and reduce carbon emissions from clothes.

These two machines are very good. Let's make more low-carbon machines with our hands and make life better.

My invention-Composition 6 for Grade Four Life is inseparable from the development of creativity: communication is inconvenient, and people invented the telephone; People invented cars when the traffic was inconvenient; It is inconvenient to calculate, so people invented electronic computers.

I am often late, because I can't get up, and I am often criticized by my teacher. How to solve this big problem?

So, I want to invent a multifunctional bed. This bed is no ordinary bed! There is a sensor under its bed, which can be connected to a mobile phone. As long as people set the alarm clock, the sensor will wake you up accurately. If it can't get up, it will take compulsory measures immediately. It will quickly stretch out two mechanical arms in the bed, and then pick up a feather to tickle you until you wake up laughing. If you can stand tickling, don't worry! It will immediately start the second compulsory measure, at which time it will emit a very annoying and unbearable sound wave, and at the same time it will throw away your quilt in case you block your ears with it. At this time, you will get up. The process only takes a few minutes and there is no waste of time. What, are you afraid to get up?

Life is full of inventions. As long as you pay attention to life, you can invent many interesting and convenient things.

At noon in midsummer, the sun was blazing and the weather was as hot as a steamer. We endured the heat and went out to buy some big round watermelons. When I got home, I took a knife, cut the watermelon, and then picked up a spoon and wolfed it down. In a short time, half a watermelon was eaten. At this time, the watermelon skin is crescent-shaped. I think it's a pity to throw it away; What should I do if I don't lose it and it stinks if I keep it? I thought about it, but I still can't think of a good way.

Two days later, I saw a sailboat sailing on the sea on TV. It suddenly dawned on me: isn't it a "sailing boat" to use watermelon skin as a cabin and then cut out some "machine" parts from cardboard? Surprised, I took out the watermelon skin the day before yesterday, found a small stick, then took out scissors to cut off the sail of the sailboat and stuck it with double-sided tape. A sailboat has been built!

However, sailboats must float on the water. So, I took a basin of water and gently put the sailboat into the water. I can't believe the sailboat didn't sink, but floated on the water! In this way, my invention succeeded!

Through this invention, I also understand a truth, that is: to have a pair of observant eyes and a thinking brain. I hope I can become an inventor and invent more practical things in the future.

My invention-I have an invention machine which is very useful and can invent all kinds of things.

I used it to invent a shoe that can run in the air. I put it on and walked slowly in the air. I found a thief stealing from someone else's house, so I quickly invented a communicator with my invention machine, contacted the police with the communicator, and the police caught the thief. My family thanked me so much that I left quietly. Then I invented a lifting plate with the invention machine. You can enjoy the scenery in the air as long as you use the manipulator to lift and move at will.

I have another idea. Can I invent a tool that can help others automatically? I began to study it. After hard work, I finally invented this tool. I instructed it to help people in trouble and began to study other tools by myself. Seeing that the tool I invented to help others came back, I put it away. I think I still can't swim, so I invented a tool that can make people learn to swim with my invention machine.

After learning to swim, I want to play with my companions, so I go to them. When I saw them playing in the square, I followed them. I saw their faces full of sadness, so I asked them what was wrong. It turned out that their kite was stuck in the tree. I immediately put on my invented shoes that can walk in the air and took them off, and ran happily on the grass with my friends.

This is my invention machine. I can invent anything. I'll give you one if you like.

Last night, my father took me out for a haircut, and the handsome barber gave me an inch haircut. I like it very much, but the nasty broken hair can't be washed clean and sticks to the scalp, neck and collar. Today, I still feel itchy in my neck. I think I have to invent a multifunctional comb to solve this problem.

The shape of the comb I invented is similar to that of an ordinary comb. There are several buttons on the handle. The red button has the function of blowing. With a light press, hot air can be continuously blown out of the comb, and the hair can dry quickly when combing. There are many small holes in the teeth of the comb. Press the yellow button to generate suction from the small hole, and suck away the broken hair attached to the skin while combing your hair. You can also adjust the suction intensity at any time, so you don't have to worry about broken hair running into your neck anymore. Finally, when you press the blue button, the storage box of the comb can pop open and the collected broken hair can be dumped into the trash can.

I'm going to put some walking beads on this comb to make it have massage function. Massage the head, relax nerves, increase scalp blood circulation, and play a health care role. I comb my mother's hair every night, which can reduce her gray hair and keep her young and beautiful. Besides, I want to put an ink bag with hair dye in it. I can spray it evenly with one button and dye it while combing. It's really good and convenient. Grandma doesn't have to go to the barber shop to dye her hair.

This is my "little invention", a multifunctional comb that everyone can use.

My invention-fourth grade composition 10 students! If you want to ask me what the future pen is like, I will tell you without thinking: "I invented the future pen." It is not only beautiful and generous, but also very practical. If you don't believe me, let's take a look! "

The future pen case I invented is colorful and will change colors according to the seasons. Spring turns green, summer turns red, autumn turns gold, winter turns silvery white, and it is colorful and beautiful under the sunshine! The pen body is slender and delicate, with clear patterns, and there are many small animals and fairy tale characters. Its pencil case is dark green, like a military cap worn by soldiers, very imposing! At night, it will shine brightly. If a rainbow appears in the sky, it will take care of colorful light, which is very beautiful.

This pen is versatile and has three small and exquisite buttons. Press the first button, it will be a pen, press the second button, it will become a pencil, press the third button, it will become an eraser, which is very easy to use. In the past, pens were very inconvenient. Every time I write, the pen always breaks the lead and blackens the book. The pen is still very weak, and it will break when you drop it. Pen ink always drips on the book, making the book full of ink. Appear for a while, don't appear for a while, and the words written are always intermittent, which is extremely annoying. But the pen I invented can solve these troubles.

There are many wonderful things about this pen. For example, if you make a mistake, it will sound an alarm to remind you. It can also play music. As long as you say the music you want to listen to, it will release beautiful music to eliminate your fatigue. Moreover, the lead in it never needs to be changed or used up, which is particularly time-saving and convenient.

With the rapid development of society, there are more and more high-tech pens, but after listening to my introduction, everyone's interest in the pens I invented must have doubled!

My invention-fourth grade composition 1 1 robots are getting smarter and more capable. They can make a lot of contributions to mankind. So I also want to invent my own robot. What can he do for me? Please look down!

Do housework: when mom washes clothes, robots can help. It can use its flexible arm to help mother hang clothes on the hanger, which saves the time of pulling down the hanger. When the clothes rack is full of clothes, it will stretch out its arm and let mom hang clothes again. When sweeping the floor, it can walk quickly with the wheels under its feet, so it does housework much faster. When mopping the floor, the wheel will become a sucker, so it won't slip when walking.

Exercise: When we go swimming, it will start the waterproof diving function, and there will be a barrier around it, so that it can swim underwater and play with me. When you play ball, you will start sports mode. It will break the ball when I dribble and "block the net" when I throw the ball, which can not only exercise my will, but also train my dash and defense.

Transformation: When I go to school, it will be transformed into a bicycle, which will allow me to get to school quickly. When he laughs, he becomes a person and walks home. I think when I want to play computer, it will become a computer, and at a certain time, it will become a person. Don't let me continue to play, in case I am nearsighted.

How's it going? My invention-robot is not bad, but remember to charge it every day.

My invention-composition for the fourth grade 12 If there is no invention and discovery, our life will be very difficult, everything will be eaten raw, and it may also cause many deaths. None of us want to live this primitive life, so invention is very important to us modern people.

If I were an inventor, I would invent an arbitrary door, so that we can freely shuttle to various places in a narrow space and leave good memories there. Moreover, this will not cause air pollution and make carbon dioxide emissions less. If I were an inventor, I would make a detector. If there is an earthquake, it will accurately predict the location, time and direction, let people evacuate to a safe place and reduce casualties.

If there were no inventors in this world, we might not be here now, because those inventors did not invent these things. Our life will be as painful as primitive people. So we should know how to be grateful to them, because they have made great efforts in the process of inventing these things, and we should cherish these things and not destroy them.

If I want to be an inventor, I will learn from Edison, endure countless failures and setbacks, and finally succeed with perseverance and perseverance. I won't give up and I won't be discouraged. The teacher said, "if you try your best, you can achieve something." Doing the best is success. " So I will continue to invent and create. Take out the money you earn to help your mother heal, so that your body won't have sequelae. Moreover, I also want to donate my money to those people from poor families, so that they can be as healthy and happy as me every day.

My invention-composition for the fourth grade 13 It's amazing that scientists can invent so many interesting things. I want to invent a beautiful and interesting "library" like a scientist.

On a sunny weekend, I plan to make an invention in the garden, so that everyone can open their eyes and know that I am also a "Little Inventors". I made a beautiful and interesting book box. It looks beautiful. There is a rainbow painted on it, as if there is a rainbow inside, and there is a beautiful story.

Its material is waterproof skin, which is smooth and beautiful.

It has many functions and features. It has a handle with a button. Press hard, or the book will fall if you hold it. Press the button and the box will open automatically. There are many books in it. If you don't discover the mystery carefully and look for it without a purpose, it will be very troublesome. There is a writing box beside the book box. You can write what you like, and you can use Pinyin instead of words you can't understand. A pair of hands will help you take out the book. If you don't know what to look at, please help yourself. Another feature of the book box is that all the things in the bag are put into the book box, and the book box will automatically become a beautiful small bag, which is light and convenient to carry.

Is the book box I invented interesting? I will also become a great and intelligent "scientist". I hope that day will come soon, so that everyone can open their eyes and know that I am also a "little scientist".

My invention-composition for the fourth grade 14 People are very busy now. They have no time to accompany their children and help them with their homework. So I want to invent a tutor robot called Xiao Du.

The tutor robot I invented has hair on its head. Like a real person, its head is made of iron, its eyes are like small light bulbs, its ears are made of wood, and its mouth is smiling. Looks very amiable. The fuselage is made of nano-materials, which is not afraid of getting wet by rain. The cupboard is a refrigerator, and children can eat an ice cream when they are thirsty. A leg is a shared chair. It can be turned into a leg or a chair, so that children can sit in the chair and rest when they are tired on their way to school. The best thing about this tutor robot is that it can teach children to learn. Just say "little" and "little" and he will respond to you by saying "here we are". At this time, he can say your questions or questions you don't understand, and he will answer you patiently until you understand. There is a button on the back of its head. When it is pressed, it will become a tablet computer, allowing children to do problems. Otherwise, you can watch videos on the tablet and learn this problem easily. This kind of robot can not only teach children to learn and do housework, but also tell children stories and play games with them. With this robot, life is much more convenient.

This is the robot I invented-the tutor robot!

My invention-the fourth grade composition 15 "Hey, I'm really tired with this hand!" My mother, who has always liked watching TV dramas on her mobile phone, is complaining again.

"Have to help her solve this problem. Just what should I do? " I picked up the rubber band that my mother put on the table and thought, "Why don't you need my mother to hold a mobile phone?" Suddenly, an idea flashed through my mind. "If you use a rubber band to fix your mobile phone to an object, don't you hold it in your hand?" Thinking of this, I found a small bottle to fix it, but the bottle was too light. I thought about it and filled it with water. That's great.

How to do experiments without a mobile phone? Mom won't give me her cell phone. Yes, I found a cardboard about the size of my mother's mobile phone as a mobile phone. I looked at these materials and carefully combed my thoughts: I have to tie my mobile phone first. How? I took the rubber band around on the left and around on the right, and I can't figure out why. When I wound it, the rubber band ended, which gave me great inspiration: "Hey, by the way, you can tie the rubber band into a circle and put it on your mobile phone." I immediately measured the width of the cardboard, made a circle at both ends of the rubber band and put it at both ends of the mobile phone. Where are the bottles? Hey, put it between the cardboard and the rubber band. I put the bottle in. I put them on the table and the cardboard lay comfortably on the bottle. But it's too easy! What shall we do? I thought about it and made a summary in the middle of the rubber band. The rubber band tightened and the cardboard leaned against the bottle, just right.

I gave my little invention to my mother, and her mother put her mobile phone on it, which is very easy to use. She gave me a thumbs-up and said, "You are great!" After listening to my mother's praise, my heart is sweeter than eating honey.