Build a Catapult This is by far one of my favorite science projects that my kids have made. It is quite simple to build kids 4 and up can make this catapult and they will love how far and fast this catapult will go trust me even you will be having some fun.This will definitely show how forces and motion work you can also use this for a history project . Here is what you will need 1 spoon 1 rubber band 1 binder clip 2 clothespins craft sticks hot glue ruler / or paint paddles Here is the step by step instructions from CSWN Projects and Activities all credit to them you can print the pdf http://cswnetwork.org/community/projects/pdf/194.pdf Here is the finish catapult my kids made Front Back