What child doesn't want to launch a toy across the room? You will need 7 Popsicle sticks, three rubber bands, a milk or juice cap and a cotton ball or small toy to launch. Start by stacking five craft sticks together and hold them together with a rubber band at the end. Then stack 2 craft sticks and wrap a rubber band around them. Spread the two craft sticks apart and place the set of five Popsicle sticks in-between the two craft sticks. Wrap a rubber band around all of the craft sticks to hold the catapult together. Glue or tape the milk or juice cap to the top Popsicle stick. Once you have created the catapult, try launching things across the room and measuring how far they go.