Get pulley-ed into mechanical engineering! Construct your very own claw machine by building a frame, wrapping string around a pulley system, and attaching a claw. Then fill it with DIY prizes or items you have around the house! Learn all about the physics of pulleys and the real-life applications of claws. Additional activities in the included book will keep you experimenting to create fun twists on this arcade challenge, such as a magnetic mover and drawing tool.