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
Planetary Gear Unit for Students, mall-size unit for explaining the principle of planetary gear. By setting the internal, sun and pinion gears at different motions
Planetary Gear Demonstrator, Size: 24cm x 14cm x 14cm, for explaining the principle of a planetary gear. By setting the internal sun and pinion gears into motion, Class Pack of 10