Tamiya 70224 Swimming Dolphin Educational Kit  [70224]

Tamiya 70224 Swimming Dolphin overview

This Tamiya 70224 Swimming Dolphin kit is part of Tamiya's STEM line and gives hobbyists a practical way to learn simple mechanics by building a motorised model. The finished dolphin uses an underwater gearbox to create swimming motion, making it a solid pick for hands-on educational modelling.

Size and motion details

The assembled model measures 182mm long, 100mm wide and 60mm high, providing a compact yet detailed subject to build. A submarine mini motor drives the mechanism using one AAA battery (not included) and converts rotation into a crank action that moves the tail fin up and down, pushing the model forward while the head bobs naturally.

Materials and construction

Made from flexible polypropylene (PP) sheets, the body and fins are designed to flex for a realistic swimming action. The kit also includes a float secured by a suction cup so the dolphin remains buoyant when in water.

Learning and adjustment

This model is a straightforward introduction to mechanical assembly and is suitable for younger builders with supervision. By tweaking the fin angle you can alter the swim path, which provides a clear demonstration of simple mechanical control.