Find some direction in an otherwise aimless day while learning about the principles of mechanics. The 3D Dynameter operates by turning air pressure into motion.
wooden self-propelled models. 🚂Best for all occasion gifts and family projects. Smart and engaging hobby. 🚜🚋
5.8 x 2.8 x 6.7 inches
14.6 x 5.5 x 1.2 inches