?Check out this classic Track Builder physical play experience enhanced with the Hot Wheels id app and mini games! The evolution of Hot Wheels is here and it takes classic car play into the digital realm so kids can build, rebuild and set new records and prove their racing and stunting skills to everyone! The Power Boost Box includes an innovative dual booster in the lid and 20+ feet of track and parts for 4+ racing and stunt configurations. Now kids can race on the track they build and level up on the app. The Hot Wheels Track Builder Unlimited Power Boost Box is designed to be compatible with other sets and the Hot Wheels id system (sold separately) for enhanced versatility and epic Hot Wheels action. Connect with the Hot Wheels Race Portal (sold separately) and compete in Track Builder mini games with the free app! Kids can choose their build, track performance and then do it again! Great gift idea for kids 6 years and older. Includes two Hot Wheels 1:64 scale vehicles.