Collect & Build all four racers in the Racecar Rally Series - Stock Car, Dragster, Formula Car and Sports Car - each with a high-speed motor for exciting racing action! All sets have over 200 parts, including bricks, rods, connectors, wheels and specialty parts. There is also a K'NEXman to sit in the driver's seat! Build the lead model or an introductory model, then combine the parts from multiple sets to build even bigger racers! The Stock Car and Dragster combine, and the Formula Car and Sports Car combine. And that's not all - when you build the combo racers, you can use the spare parts to build a finish line! Each set sold separately. Requires 2 "AA" batteries, not included. For ages 5+.