Ugears "Safe Kit" I DIY Self-Assembly Mechanical Kits For Teens and Adults smiley or reverse with a kinematic

or reverse with a kinematic pair of gears with different ratios and

It’s a clever way to offer a business card or a fun way to store and show off your favorite trinkets

steep turning its sportbike during smooth movements

and makes entering and going out of turns easier for the driver

Ugears "Safe Kit" I DIY Self-Assembly Mechanical Kits For Teens and Adults smiley or reverse with a kinematicThis is a real safe with a functional 3 digit combination lock. Build your own safe with a unique lock combination and store your precious things (or candy) in it! An outstanding gift on its own, once assembled, it may serve as a secret gift package, requiring a person to practice some safecracking skills. It is possible to get the right combination by twisting the knob and listening carefully to the clicking sounds (provided the safecracker knows the