The Ugears Dynamometer converts air pressure into motion. By blowing on the upper gear, the Ugears model's system starts to move. The arrow jumps from icon to icon, conveying ideas about things you might want to do. The Ugears Dynamometer is an easy-to-assemble model that helps understand basic mechanical principles through its cascading sequence of gears and mechanical connectors, also known as Maltese cross gears. Mechanical functions - all models generate movement. Easy assembly - all components are pre-cut with a laser and ready for assembly. The laser-cut parts fit together without any glue. As a result, 3D models with self-propulsion or special functions are created. The functional models are not toys for children. The wood used comes exclusively from sustainable sources.