Hot Wheels Track Builder Unlimited Rapid Launch Builder Box is the all-in-one track building set that will wow any Hot Wheels fan. It features the necessary components to build three unique stunting routes that include double loops, a ramp jump, and a gnarly track configuration where cars race through a fast turn before speeding off to other adventures. Kids use the innovative 4-car magazine to load cars into the centrifuge launcher that sends vehicles onto one of four exit routes for non-stop excitement. The Hot Wheels Track Builder Unlimited Rapid Launch Builder Box includes external storage pockets that securely and conveniently hold accessories until they're called to action. Additional track components (sold separately) fit inside the box as well. Colours and decorations may vary.. ?External storage compartments conveniently and securely hold the various track components, and there's also room inside the box for existing track pieces or for ones yet to be acquired.