ZOOB RacerZ Car Designer lets you build three cars at the same time to race against each other, or build a 12 wheeler flatbed! The set includes 76 ZOOB pieces, 12 wheels that work like gears and 3 instruction guides to build a Supersonic Stinger, a Gear Getter and more. ZOOB is not like any other building set - the pieces include gears, axles 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 6 years of age and older.