Dynamics System, An economical way to teach dynamics including, but not limated to, position, velocity, acceleration, force, elastic and in elastic collisions, momentum
Robot Engineer, With durable storage case and illustrated storybook, Dimensions: 14.7x6.3x9.4in, The robots have moving parts, wheels, and gears, simple machines and gear trains, colorful plastic building pieces make it easy for small hands to put the models together