This is a nice souvenir, or a kind of roulette.
Blowing on top gear, you'll see how the whole system is set in motion.
Arrow, jumping from one to another icon shows what you need to do in accordance with your power.
This is one of the easiest of our models to build.
But at the same time Dynamometer by UGEARS allows to understand the principles of mechanics, - a cascade of gears and mechanical connection known as the "Geneva drive".
No glue, no batteries needed.
Dimensions of the model: 5.8*2.8*6.7in (147*72*170mm)
Package size: 14.6*5.5*1.2in (37*14*3cm)
Ugears Dynamometer Mechanical 3D Puzzle Best Eco-Friendly Wooden Gift Set for Kids and Adults - B01J1USYZW