The Mechanical Aquarium is the first UGears model without any elastics!

The Mechanical Aquarium from Ugears is an ingenious saltwater fishbowl, with two pet tropical fish chasing each other around a forest of macroalgae fronds, inside of which hides another small inhabitant of the marine environment—a seahorse! The beauty, variety and intrigue of saltwater fish-keeping makes it one of the world's most popular hobbies.

Not only is this DIY aquarium model kit, with its original theme and design, a fine addition to the Ugears catalogue, but it also features a unique mechanical action. The fish and algae rotate simultaneously and in parallel, at different speeds and in different directions, simulating the smooth, undulating rhythms of underwater plant and animal life. The elegant fish look like they are really swimming as they move their heads and tails side-to-side. The Mechanical Aquarium model is unique in that while many Ugears models are propelled by rubber band motors, the Aquarium is driven by a spring, for longer action and greater longevity. At Ugears we pride ourselves on innovating, and on listening to our loyal customers, many of whom have been asking for models with spring-loaded mechanisms. We are proud to bring you this spring-action aquarium—a first in our growing catalogue of Ugears models!

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.

At Ugears we strive for gorgeous design with surprising mechanical action, to charm and delight our customers. We think you will agree we have achieved that with this beautiful Mechanical Aquarium. With Ugears there's always that extra touch of whimsy, embodied in this model by the hidden seahorse at the center. Part of our core mission is to bring people together, especially across generations, as they build and play with our unique mechanical marvels. Make the Mechanical Aquarium your next family project!