The Hot Wheels Track Builder System offers the ultimate race experience for boys by allowing them to design, create and customize their very own track challenge with a variety of stunts and layouts. Amplify your Track Builder experience with the Volcano Blowout! When you add this new electronic stunt and race by, you activate the seemingly dormant volcano. Watch out, the rumble noises sound like trouble! You may safely pass through twice, but a third time will cause a volcano eruption, blasting lava boulders that wreak havoc on your Track Builder system. The bigger the threat, the more thrilling the ride! Boys who love excitement will love this stunt. If you can dream it, you can build it with Track Builder. Ages 4 and older.