Karthik Raj and Nishant explained about a air balloon car in this video. You just need 4 or more things to make the air balloon car. You need two rubber bands, one pen, two toy cars, and one air balloon exactly to do this air balloon car. First of all, you just take the air balloon and fix it one side of the pen which is opened two sides. Next place the pen on the top of the toy car and tie with a rubber band and make sure that the rubber band is in the middle of the toy care and not in the toy car wheels. So the air balloon cars is finished right now and blows some air into the pen and see what happens the car is running with the pressure of air from the balloon. Enjoy this video and make one air balloon toy car.