One of the best ways to get kids interested in science is to show them how the things they use every day can be used for other purposes. Many household items can be made into toy cars with a little bit of creativity. If you are crafty, you can use paper, scrunched-up cardboard, aluminum foil, rubber bands, and even bubble wrap.
You can make a toy car out of a lot of household items. You can make a toy car out of a can of baked beans or you can make a toy car from a Pringles tube. Another good option is a rubber band, a piece of cardboard, and some tape. The rubber band is wrapped around the cardboard, then the rubber band is tied to the back of the car. Batteries can also work as wheels.