From Muppet Wiki

McDonald's released a set of four Muppet Babies Happy Meal toys (plus two Under Three toys) in 1987.

The main set had the Babies riding wheeled vehicles. The figures and vehicles were removable.

• Baby Kermit on a skateboard
• Baby Piggy in a pink car
• Baby Gonzo riding a green Big Wheel tricycle
• Baby Fozzie on a yellow hobbyhorse on wheels

In Canada, Baby Animal in a red wagon was added to the set. Some of other figures were sculpted differently: for example, the American Baby Gonzo wore shoes whereas the Canadian Baby Gonzo was barefooted.

The Under Three toys were one-piece PVC toys. McDonald's often makes special toys for young children when the main toys include pieces that could be swallowed.

• Under Three Toy: Baby Kermit on roller skates
• Under Three Toy: Baby Piggy on roller skates

There were four Happy Meal Boxes released with this set. Each box corresponded to the toy for that week. i.e. there was a box for Kermit, Piggy, Fozzie, and Gonzo. Tray liners were printed with a "Grand Prix" game which could be played with the pvc figures and a dice.

Among the P.O.P items (Point of Purchase items, meant to draw attention to the promotion) there was an Employee Button featuring Baby Kermit(was rectangular with a heart), a register topper, a display featuring the four premiums, translights (illuminated plastic sheets featured on the menu board), and a dangler that hung from the ceiling featuring the toys.

McDonald's made a second set of Muppet Babies toys in 1990.