Sesame Street: Magical Beastie Quest was designed to teach young players about phonics, letter recognition, and spelling. The game invites players into Building 123, where they'll meet beloved Sesame characters and embark on adventures to unlock the magic of letters. Player progress through the game with their Magical Beastie companions who they have to care for and teach words.

Players receive a custom muppet avatar and their very own room in Building 123, both of which they can customize to their liking. The adventure spans a variety of enchanting worlds, from Abby's Letter Garden and Cookie's Piñata Smash World to Tango's World of Letter Doors, Dorothy's Tank, and Abby's Flower Patch.