The little secret of gyro

This week, we made spinning toys with children, and children still prefer gyroscopes. When commenting in the activity area last week, the teachers have triggered the composition of the gyro (face, axis and handle). After analysis, children are more or less consciously looking for corresponding materials in the production process. In the early stage, the teacher carried out the early stage operation, mainly putting in glass marbles, table tennis, ocean balls, cotton swabs, CDs, paper plates, paper cups and other materials. In the process of production, some interesting things happened to us, and the children were also exploring the unknown small world.

1. Why is my gyro crooked?

Because I have shared the composition of the gyro before, the children who come to the workshop naturally know that they should choose three materials to make it. On Tuesday morning, Hu made a gyro disc. The handle is made of milk powder spoon and the spindle is made of table tennis. Judging from the selection of materials, there should be no problem. Soon, I heard his call, "Teacher, my gyro is crooked." After approaching, it was found that the handle and shaft of the gyro were not on a vertical line, and the stick was crooked, which led to the gyro being skewed. Teacher: "What do you think is the reason?"

Yang Chen: I don't know.

Teacher: "What's the difference between your coat and other children's coats?"

Yang Chen: "Gao Mai used a flower paper cup, while others used a milk powder spoon" (he found the difference between the materials used by his friends).

Teacher: Well, you are very observant. I think you two have different materials, but they are both good. I don't think it's the material. What do you think, McMillan?

Mike: He's not very clingy (pointing to the handle). I think it's crooked.

Teacher: Then go to the toy city and find a gyro.

When commenting and sharing in the activity area, we discussed Yang Chen's distress and Mai Mai's discovery.

Yang Chen: My spoon is stuck and the lid won't turn.

Teacher: What did you see in the toy area?

Yang Chen: Straight.

Teacher: Where is it straight? (Yang Chen points to the axis of the gyro)

By comparing the physical gyro, we find that the rotating shaft of the gyro is actually one, which passes through the rotating surface vertically. In the gyro we made, the vertical rotating shaft is divided into two parts, the handle in the hand is called the rotating shaft, and the lower one is called the rotating shaft. But when we glue it again, the rotating shaft and the rotating handle are vertically aligned with the rotating surface, while Hu's rotating handle is off-center.

2. My gyro has changed!

I have been making my own gyroscopes in groups these days, but we are a girl with particularly dexterous hands. She came to the studio and finished her work quickly. When I was free to play, the quiet little girl suddenly said to me, "Miss Li, my gyro has changed." I also looked at it curiously. "Where has it changed?" Can say "look" while turning.

The red ribbon, which was originally decorated like the sun, changed during the rotation, making the rotating surface of the gyro look like a reddish round surface. Of course, this is what I think in my heart, and it is my subjective cognition based on my experience in implementing the theme. I don't know if Kexin is such a discovery, so I asked her further: "Tell me about the changes you found?" I can say, "I'm striped all over, but when I turn around, I'm not striped." "Your discovery is amazing, so why did this change happen?" Good "because it only needs one turn."

When commenting in the activity area, we shared the gratifying discovery that fast rotation can change the pattern on the gyro rotor, and at the same time threw out the discussion that "rotation can also change the color of decoration" I took out the decorated yellow and blue gyro and asked the children to observe the changes. Obviously, children can easily find that the rotation makes the yellow and blue gyro look green. The children shouted in surprise, but they didn't seem to understand the change of color, so in their understanding, it was rotation that changed the color.

This week's homemade gyro activity is actually not difficult to do by hand, but the little secret hidden in the gyro is also fresh, exciting and valuable for children.