UGears Mechanical Aquarium Model KitTwo fish dance around their algae friend in this wooden DIY aquarium modeling experience. Assemble then watch them swim! As you build the 325 piece wooden aquarium, you will learn about the action and interplay of drive gears, the function of pendulums, and about spring action mechanisms. 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