Build your own authentic catapult with the KEVA Catapult Construction Set! With planks, a little glue and the help of easy, step-by-step instructions you can build a catapult in no time. Then let the fun and experimentation begin! What shoots farther, a marshmallow or a piece of macaroni? How does the objects course change when you pull the arm back to different points? If you make the flight deck higher, how does it affect the hurl? The KEVA Catapult Construction Set includes pre-drilled planks, wood glue, leather strap, ruler, rubber bands, cup, 2 balls, target mat, fasteners and instructions.