Off to the ZOOB races; With 12 wheels, ZOOBMobile 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 or a gear getter; Includes: For ages 6 years and over. WARNING(S): Only for domestic use.