Welcome to the LEGO Hidden Side universe, where physical and digital worlds merge to provide an incredible, single or multiplayer augmented reality (AR) experience. This LEGO 70431 Hidden Side The Lighthouse of Darkness playset combines the open creative play of LEGO building toys with app so that interaction with the model triggers events in the digital world. Cool interactive building toy for kids Simply scan this lighthouse of darkness model with a smart device, equipped with the free Hidden Side AR app, to reveal an amazing digital world. Here, kids can explore and solve mysteries, hunt ghosts and battle the boss ghost Joe Ishmael. And with 5 cool mini-figures, they also get to enjoy endless hands-on LEGO role-play fun! An ever-changing digital play experience The LEGO Hidden Side universe is set in the fictional town of Newbury, where ghosts haunt people and buildings. The augmented reality play experience is constantly enhanced through new content, ghosts and special events. The LEGO 70431 Hidden Side The Lighthouse of Darkness includes 540 pieces. Ages 8 and up.