This LEGO Hidden Side building kit combines the open creative play of LEGO building toys with digital play for an immersive single or multiplayer augmented reality (AR) experience A digitally interactive LEGO Hidden Side castle model with lots of manual features including an accessible observatory tower, plus Jack, Parker, Vaughn, Nehmaar Reem and 2 Shadow-Walker minifigures The mystery castle model comes to life when viewed through a smart device equipped with the free LEGO Hidden Side AR app; Kids then get to solve mysteries, find items and hunt ghosts in a haunted digital world This action-packed LEGO Hidden Side playset is a great gift idea for LEGO builders aged 9 and up and fans of virtual reality and video games When built, this LEGO Hidden Side Mystery Castle (70437) augmented reality playset measures over 13" (34cm) high, 12" (31cm) wide and 10" (27cm) deep Fans of virtual reality and video games love the amazing LEGO Hidden Side universe, where physical and digital worlds meet to provide an incredible, single or multiplayer augmented reality (AR) play experience. This LEGO Hidden Side Mystery Castle 70437 playset combines a buildable LEGO model with an app, so interaction with the model triggers events in a digital world. The mystery castle springs to life when viewed through a smart device with the LEGO Hidden Side AR app. Children then get to explore, solve mysteries, hunt ghosts and battle boss ghost The Maw in an exciting digital world. The possessed castle model also folds out, setting the scene for action-packed role play with the Jack, Parker, Vaughn, Nehmaar Reem and 2 Shadow-Walker minifigures. The LEGO Hidden Side universe is set in the fictional town of Newbury, where ghosts haunt people and buildings. The AR play experience is constantly enhanced through new content, characters and special events.