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. Hot Wheels id is the revolutionary way to play with Hot Wheels vehicles and track. Great gift for ages 8 years and older. Colors and decorations may vary.