Kids can build their own catapult with planks, glue and the help of easy, step-by-step instructions. What shoots farther, a marshmallow or a piece of macaroni? How does the object’s course change when you pull the arm back to different points? What happens if you make the flight deck higher? Everything you need to build the catapult is in the box – no tools required! Pine planks, wood glue, cotton rope, ruler, rubber bands, cup, 3 bean-bag projectiles, target mat, fasteners and instructions.