The model that uses the same principle as a Pneumatic engine, but has a certain game element added to it! Blow on the top gear and the whole system comes alive. Depending on the air pressure, the arrow will point to a quirky picture that symbolizes the thing you can do according to your strength. Thanks to the pictures it also looks very cute as a décor element! The Dynamometer is one of the easiest UGears models to assembly. But at the same time it demonstrates the principles of mechanics – in particular, the cascade of gears and the mechanical junction known as Geneva drive!