The set had the Babies riding wheeled vehicles. The Baby toys and vehicles were removable. The four vehicles hook up together to form a train. * Baby Kermit on a yellow and red push car * Baby Piggy on an old-fashioned three-wheeled bike, with a large front wheel * Baby Gonzo in a green airplane * Baby Fozzie in a red mining cart The first set of Muppet Babies Happy Meal toys was made in 1987.