This unique wooden puzzle features two fish chasing each other, as well as a tiny seahorse, observing the action from within algae fronds. The fish and the algae move parallel to each other but in different directions and with different speed, resembling the actual sea life rhythms. 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. This model is designed 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.
With 325 parts, the model’s difficulty is rated as medium to hard and will take 4-8 hours to assemble it. No glue or special tools are required and you will get extended exposure to the wonders of moving mechanical parts and gain an understanding of gears, pendulums and spring-action mechanisms. Everything needed is provided, including high-quality plywood boards with laser pre-cut pieces and step-by-step color manual. Completed model size is 9.3″ x 9.3″ x 7.9″. Recommended for ages 14+.