Review on UGEARS Dynamometer Self Assembly Construction Puzzle for Cognitive Stimulation by Jared Poinson

Assembling this kit gave me incredible pleasure. Once everything was put together it worked very well. If you enjoy building things, puzzles or just keeping awesome cars moving, this is a great set. After you receive it, follow the instructions very carefully to make sure all the pieces line up. Also remember to wax the meshing area of the gears before assembly. It is very important. Aside from following the basic instructions, I only had to sand down a tiny bump on the rotating part to get it working properly.