UGears Mechanical Aquarium Model Kit

The Mechanical Aquarium has 325 pieces, is rated "Medium" level, and has an estimated assembly time of 6 hours. As you build the wooden aquarium, you will learn about the action and interplay of drive gears and driven gears in gear sets, the function of pendulums, and about spring-action mechanisms. You will experience the satisfaction of building something beautiful with your own hands, without need of glue or special tools. Everything you need for this fun DIY project comes right in the box: high quality plywood boards with precision laser-cut pieces that you snap out then snap together, the metal spring that powers the mechanism, and of course a set of detailed, illustrated instructions in 11 languages.

To set the model in motion, wind the knob under the aquarium with about 25 half-turns, flip the switch from "STOP" to "SWIM" mode, then watch as your Mechanical Aquarium comes to life! The mechanism contains an internal pendulum to regulate and smooth the movement. We have designed this model to be the very definition of operational simplicity for users: one switch, two modes: on and off. You can stop the model at any time, or just let it go and enjoy the movements of the automaton fish and fronds for about 40 seconds.