Hot Wheels id is a unique system of play that blends the exhilaration of Hot Wheels racing with a safe, connected platform of creativity, experimentation and competition. It all starts with one-of-a-kind racers that have an embedded NFC chip giving each a unique identity. Download the free app and measure performance on a smart phone or tablet. Mini collection racers compatible with Hot Wheels id feature Speed Demons including Corvette C7R, SRT Viper GTS-R, 2016 Mercedes AMG GT; and Aston Martin One-77; as well as the Street Beasts: Howlin' Heat, Motosaurus, Shark Hammer 2.0 and Arachnorod. Each sold separately and subject to availability. Hot Wheels id is the revolutionary way to play with Hot Wheels vehicles and track. Great gift for ages 8 years and older.