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