It is an interesting kit, which is akin to a foutune wheel. Blowing on the top gear, you’ll see how the whole system is set in motion. The arrow, jumping from one pictograph to another  will show what you have to do according to your power. It is one of our simplest models to build. At the same time the dynamometer from UGEARS helpes to understand the principles of mechanics, namely the cascade of gears and mechanical connections known as the «Geneva drive».