Education Science Experiment Physics Model Kit/TOY

Thames & Kosmos Physics Discovery Experiment Kit V 2.0 Includes 17 projects/Experiments Construct 14 Models conduct 48 Pages Manual book. learn about forces and simple machines. Each model demonstrates a fundamental idea in mechanical physics. Build a balance scale, a freight elevator, and a bicycle, to learn about lever arms, pulleys, and wheels. AGE 8-15 ***One box is new, never been open **AND ** one is OPEN BOX