ZOOB RacerZ Fastback Monster Trucks lets you build the big rigs! Build sturdy industrial vehicles, then set them in motion. The pull-back motor propels the car up to 25-feet, without batteries. The kit includes 50 ZOOB pieces, a powerful pull-back motor, working dumper bin, 4 Extra-Large rims with monster tires and instructions to build 5 vehicles like the Monster Runner or the Tow Truck (or create your own)! 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.