LEGO Hidden Side sets merge interactive augmented reality (AR) activities with LEGO models. This LEGO Hidden Side Supernatural Racing Car (70434) toy combines a buildable LEGO model car with an augmented reality (AR) app for a single or multiplayer mixed-reality play experience, where interaction with the toy triggers events in the digital world.The Supernatural Racing Car set reveals its haunted Hidden Side when scanned through a smartphone or tablet (not included) equipped with the free LEGO Hidden Side AR Games App for iPhone/Android. Kids can hunt ghosts, solve mysteries, and battle the boss ghost in an action-packed digital world. In the real world, the wheels of the car can be switched from driving to flying mode for further hands-on play and adventures.This mixed-reality experience is constantly enhanced through new content, ghosts and special events. The app is compatible with selected iOS/Android/mobile devices check compatibility at lego.com/devicecheckThe LEGO Hidden Side Supernatural Racing Car augmented reality model (70434) measures over 2"" (7cm) high, 7"" (19cm) long and 4"" (11cm) wide.Contains 244 pieces.