What I invented 20 years later

Hey! Twenty years later, I have become a famous scientist. Invented many practical things. For example: "joke trash can", "singing piggy bank" and so on. I have also participated in various competitions and won many awards.

The "garbage can for telling jokes" is the most popular among people. If you put the garbage in the joke trash can, it will tell you jokes, usually because you laugh. Children even like to take out the garbage in the trash can. They not only laughed their stomachs off, but also told these jokes to other children.

In this way, people who don't like to throw garbage into the trash can like to throw garbage into the trash can. The sanitary situation has also completely changed.

Because I designed an electric trash can, which is equipped with a sensor. When all the garbage is thrown into the same room, the sensor will start the tape recorder and play the pre-recorded jokes. Different trash cans have different jokes.

This single electron also changed people's bad habits. Will I be good in 20 years?

The "singing piggy bank" is also amazing. It is a cube box with two buttons on it. One is heart-shaped and the other is triangle. If you click on the heart, it will change color. Turn to any color you like. If you click on the triangle, it will change shapes, including puppy shape, house shape and countless shapes. You can adjust it to any shape you like. You put in a coin. It only sings once, and it sings very well.

How's it going? I invented it. I hope these two things will really exist in 20 years.