He was a boy named Stem Air. He lived with his family and had many friends. He played with them every day and was happy. But one day, something happened that he did not want, he felt the air pollution and he was sad.

Stem air had seen non-blue clouds in the sky, these gray clouds were terrifying. While playing the game, they realized that they were breathing hard and started to think of solutions...

Thus, they thought of solutions and identified what they could do to have clean air. One solution found is not to pollute the air with cars. Another solution...

They started to work on planting trees. But they started to think about whether vehicles using air power could be made to reduce air pollution all over the world.

He decided to ask his teacher for help in order to popularize air-powered vehicles more. His teacher liked the idea very much and they immediately got to work. They drew people's attention by making models of air-powered vehicles.