ZOOB 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, 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 monstersor vehiclesor 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. ZOOB is an award-winning building set with a differencethe pieces move after you put them together, so you can play with your creations, instead of just looking at them. Although we provide instructions and suggestions for models to build, the best part of playing with ZOOB is exploring, inventing, and discovering how you can build and deciding what you want to create! ZOOB is a member of the ALEX Brands family of products. Visit www.amazon.com/alex-brands for more information on Alex Brands and our best-selling line of educational and entertaining products for kids.