UGEARS Dynamometer Model Mechanical 3D Puzzle UGears Mechanical Models are self-propelled, mechanical wooden model assemble kits. End procrastination and indecisiveness while demonstrating basic mechanics with Ugears Dynamometer. Similar to Ugears Pneumatic Engine, this model operates by transforming air pressure into motions. Simply blow onto the top gear and watch the wheel spin the arrow. Let the arrow choose your next activity for the day, whether it be relaxing with the morning paper, washing the dishes, making dinner or enjoying outdoors. Never be directionless again! The Dynamometer is one of the simplest UGEARS models but at the same time it demonstrates several basic principles of mechanics, including the cascade of gears and the mechanical junction known as the Geneva drive These designs are inspired by real-life mechanisms. The team believes that building these beautiful working models should be fun. They have dedicated their engineering know-how, meticulous product testing and quality control to a single goal: Ensuring that the models provide an engaging and rewarding experience for the whole family.