ZOOB Fastback H2H gives you twice the Power! Build two cars and race them or build one super-powered machine. Fastback Modeling System lets you create your favorite vehicle then set it in motion. A single pull-back motor propels a car up to 25-feet without batteries. The ZOOBMobile Fastback H2H includes 45 ZOOB pieces in unique racing colors two pull-back motors eight wheels with tires that work like gears and instructions to build a H2H Ultra Wedge or a H2H WideTracker or more! ZOOB is not like any other building set — the pieces include gears axels and joints that snap click and pop together! With rotating spinning and extendable parts you can actually design a toy to play with instead of just building something to look at. Create monsters — or vehicles — or monsters that turn into vehicles! ZOOBMobile puts wheels on your creations to make your ZOOB go ZOOM! Recommended for children six years of age and older.