From Fuel Games:
Get the official app for McDonalds Happy Studio online world! Our mobile app is designed for kids & parents to have fun together at McDonalds restaurants activating glyphs you can find on the Happy Meal box and elsewhere, as well as play games, register for Happy Studio, and much more! Happy Studio is a completely free online world created by McDonald's to empower kids with fun and educational games, experiences and activities that encourage family time, sharing and rewards while showcasing some of our famous character friends. Join the fun!