Hot Wheels Track Builder Stunt Collection: This collection of big action stunt pieces delivers even more Hot Wheels thrills and puts boys in the drivers seat creating the tracks and tricks they want! The best part of all is each and every fun obstacle connects easily to boys existing tracks sets. The six car-activated, dangerously dynamic stunt options include an Exploding Shed, a Rocket Launcher, a Flip Tower, Crossroad Crash, Triple Blast Alley and Side Shot Launcher. Get ready to take on challengers or improve your obstacle mastering speed. The fun keeps coming when you create your own ultimate track! Combine with the other stunts and track packs in the Track Builder line and keep creating your ideal, customized track set! Each sold separately, collect them all!.