Newton's Lab - Make Your Own Pulley Crane Kit by Kikerland
Build and use the Pulley Crane to teach your kids about how a pulley can be used to change the direction of applied forces and lift heavy objects. Everything you need to make your own desktop crane using the power of pulleys! Not only is this a super fun project to put together and use, but it will teach your kids about physics too! Newton's Third Law, anyone?
Includes: die cut cardboard pieces, metal screws and nuts, metal hook, sticker sheets, wooden dowel, string, and pulley