The mobile app features sing-along videos and other kid-friendly activities.
The iOS game will launch later this year.
Lego's upcoming building sets let kids track down ghosts on their smart devices.
Geocaching is an outdoor activity where finders use GPS satellites on their phones to hunt hidden "caches" that have logbooks where you can record your find and sometimes other stuff.
Lego reveals new AR experiences, teens are turning to Instagram for advice, and POGs are making a comeback.