Tamiya Robocraft
This series consists mainly of robots with mechanical and unique movement realized via motor. Colored clear body and clear gearbox enable demonstration of mechanical functions. Tools are supplied and no cement is required for easy assembly. Rubber tubing allows easy wiring. The see-through look, itself makes these models quite cool-looking ornaments. Motor included. Requires one R6/AA/UM3 or R03/AAA/UM4 size battery (separately available)