UGears Aquarium Mechanical Model 3D puzzle 325 pcs 14+

The Mechanical Aquarium by UGEARS is a 3D wooden model and DIY kit that recreates a small saltwater scene: two tropical fish swim around a forest of macroalgae fronds and a hidden seahorse at the center. The assembled model measures approximately 235 mm wide and 200 mm high and contains 325 laser-cut plywood pieces. The kit includes a metal spring motor, a simple on/off switch, and illustrated assembly instructions in multiple languages, enabling construction without glue or special tools.

Advantages

This mechanical aquarium uses a spring-driven mechanism (rather than a rubber band) for longer run time and durability. The fish and algae rotate in parallel at different speeds and directions to simulate lifelike underwater motion, with heads and tails moving side-to-side. The mechanism includes an internal pendulum for regulated, smooth movement. Assembly develops understanding of gear sets, driven and driving gears, pendulum function and spring-action mechanisms while providing a stable, reusable display piece.

Suitable for

• Hobbyists interested in mechanical 3D puzzles and model building
• Fans of aquariums, snorkeling or diving who want a tabletop reminder of underwater scenes
• Family projects for ages 14 and up
• Gifts for home or office decorative display

Key specifications

• Piece count: 325 parts
• Recommended minimum age: 14+
• Material: laser-cut plywood and metal spring
• Dimensions (assembled): approx. 235 mm width × 200 mm height
• Mechanism: spring-driven with internal pendulum regulator
• Assembly: snap-fit construction, no glue or special tools required
• Run time per wind: about 40 seconds (after winding)

How to use

Wind the spring by turning the knob beneath the aquarium roughly 25 half-turns, then move the switch from "STOP" to "SWIM" to start the motion. The fish and algae will rotate and the automaton parts will move for approximately 40 seconds. You can stop the mechanism at any time by switching back to "STOP". The simple two-mode control makes operation straightforward for builders and observers.

Usage recommendations

Assemble the model on a flat, well-lit surface and keep small parts away from children under the recommended age. Wind the spring carefully and avoid over-winding. Display the finished aquarium on a stable surface indoors, away from moisture and direct sunlight to preserve the wooden components.