a milk carton or cereal box
scissors (adult help)
a source of air (balloon pump or your mouth)
Directions: Take the milk carton or cereal box and cut holes on the front and the back of the box (on both sides) so that you can in insert the dowel rod in the holes. Then, attach the toy wheels to the dowel rod. Make sure that the wheels or the rod spin freely. Then, attach the fully blow up balloon to the back of the carton or box. Make sure to hold the balloons end tight. Then, let go of the balloon’s end and watch your car get propelled forward, thanks to Sir Isaac Newton’s Third Law of Motion! Try inflating the balloon with different amounts of air! Send us your results by going to www.spectacularsci.com/contact.