The Tamiya 69931 Chain-Program Robot is a project-style model aimed at students and hobby builders exploring STEM topics. The blue and yellow colourway gives the model a striking look while the assembly process reinforces hands-on learning about linkages and gear motion.
The kit uses a simple chain-program system to teach sequence-based motion. Three different chain link styles are included so builders can set distinct movement routines. As the chain passes through the gear arrangement it alters the rear wheel alignment, producing directional changes without batteries or electronics.
The Tamiya 69931 pairs practical design with bold colours and white trim. It is well suited for classroom demos or shelf display, showing how basic engineering elements create purposeful movement.
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