PlayGo Baby Toddler Key Chain - Key Ring with Keys Activity Set, Lots of Sound Activities for endless fun just shake, rattle and go with the drive & discover Baby Keys. Buttons on key fob activate learning songs about counting, car sounds, and a light. Great for pretend adventures at home or on the road. Great entertainment for your future driver. Keys help encourage interaction, discovery & exploration, imitative play, cause and effect relationships and help develop motor skills.