Consider yourself a mechanical genius when you finish building this DIY marble raise coaster! Hand rotate the crank and watch marbles go crazy down the slopes and turns! The precise gear design and elaborate mechanisms provide smooth transmission between tricks. You’ll also learn the basics of engineering and structures of machines.
Featuring precise fitting pre-cut wood sheets, it is straightforward to assemble with no-glue necessary and easy to follow pictured instructions. Includes all necessary parts and 10 marbles. Ages 14 and up.
