Build your own working skate park model made of real wood! The Mini Skate Park features lots of fun physics action, including a stair descent, rail slide and a jump—so once you build your skate park, you can run marbles through it! The assembly instructions feature a graphic novel with the Tinkineer cast of characters— Kelvin, Joule, Newt and friends —to communicate meaningful STEM concepts in an engaging format. It’s a fun way to learn about projectile motion and centripetal force while making an awesome kinetic sculpture!The Mini Skate Park takes approximately one to two hours to build, and measures 6" when finished. Ages 9 & Up Made in USA Contents: Laser-cut Birch Wood Parts, Metal Axles, Marbles, Tinkineer Graphic Novel with Assembly Instructions Household white glue (not included) required for building. Tinkineer’s Marbleocity introduces children to engineering principles and physics concepts with dynamic hands-on STEM model kits made of precision-cut wood in the USA. Each kit includes easy-to-follow assembly instructions in a graphic novel that features the Tinkineer characters. The comic introduces a physics concept or engineering mechanism that is the focal point of the model, all in a fun and engaging way! The result is an awesome kinetic sculpture and some new physics and engineering insight!