Tamiya 71111 Gearbox-Driven Robocraft Mechanical Pig Kit  [71111]

Mechanical Pig Tamiya 71111 — compact gearbox walker with head nod

The Mechanical Pig joins Tamiya's Robocraft STEM range as a buildable walking model that uses a small gearbox plus motor to create forward stepping and an added head-shake effect. Pink semi-transparent plastic is used for the body and head to reveal internal details while maintaining a distinctive look.

The assembly process is aimed at hobbyists and classroom supervisors accustomed to snap-fit components and simple screws. The kit contains a compact gearbox, motor and a reverse switch so direction can be changed during bench trials. A small flag and a manual screwdriver are included; the power source is one R04/AAA/UM4 battery sold separately.

Running recommendations: use flat, even surfaces for reliable walking. Avoid rough paving, steep slopes and dense carpet that can block the mechanism. Treat the kit as an educational gearbox and linkage example rather than a platform for speed upgrades.

Overall, the Mechanical Pig is a compact STEM-friendly model for builders who want a visible gearbox project with a novel head-shake motion for demonstrations or casual shelf display.