third law states that “every action has an equal and opposite reaction.”, and this experiment demonstrates it beautifully. keep in mind that the escaping air is the action and the movement of the car in the opposite direction is the reaction.
step 1: help your child cut out one side of the milk carton, as well as a small hole in the bottom, center, of the carton. the hole should be just big enough to fit the mouth of the balloon.
step 3: turn your cart on its back. cut the jumbo drinking straws to the width of the cart. tape one straw near the back of the carton and the second 