From Muppet Wiki

In 1995, McDonald's made a set of toys to celebrate the Happy Meal's 15th birthday.

The set included 15 toys based on popular Happy Meal franchises, including: Ronald McDonald, Barbie, Hot Wheels, E.T., Sonic the Hedgehog, the Berenstain Bears, Tonka, Cabbage Patch Kids, 101 Dalmatians, the Little Mermaid, Muppet Babies, Snoopy, Tiny Toons, Looney Tunes, and the Happy Meal Guys. The 15 toys had wheels, and linked up with each other to form a train.

The Muppet Babies toy had Baby Kermit standing on a turntable, holding Baby Piggy above his head.