Tamiya 71111 Mechanical Pig — educational walking model with nodding head
The Mechanical Pig is offered in Tamiya's Robocraft STEM collection as a buildable walking model that uses a small gearbox and motor to create stepping motion accompanied by a shaking head. The head and body are formed in pink semi-transparent plastic so students can observe internal components while the kit remains visually playful.
Construction is intended to be manageable for hobbyists and classroom groups who have used snap-lock fittings and basic screws before. The kit supplies a compact gearbox, motor and a reverse switch so you can reverse the walking direction during bench checks. Included extras are a small flag and a manual screwdriver; power comes from a single R04/AAA/UM4 battery which is not included.
Practical running guidance: operate the model on even, smooth surfaces only. Avoid inclined planes, coarse pavement or dense carpet that can jam the mechanism. Use the build as a practical lesson in compact gearbox arrangement and linkage geometry rather than as a competitive or performance platform.
Drive system: gearbox-driven walking mechanism with reversible switch
Motor: small DC motor included
Power source: requires one R04 / AAA / UM4 battery (sold separately)
Continuous run time: approximately 1 hour with alkaline battery
Dimensions: total length 135 mm
Weight: 95 g (without batteries)
Body material: ABS resin; pink semi-transparent molded parts
Included mechanical items: gearbox, motor, reverse switch, small flag, screwdriver
As a compact educational model, the Mechanical Pig is suitable for guided lessons where students explore small-gear transmissions and simple link mechanisms while enjoying a fun visual motion.
