Kenner

From Muppet Wiki

In a 1968 TV commercial for the Easy Bake Oven, a Muppet version of the Kenner Toys mascot, the Kenner Gooney Bird, pesters a human girl to make him food. At one point during the commercial, the bird pops out of one of the pies baked in the oven.

The end of the commercial has the Gooney Bird flying towards a massive wall full of Kenner products, only to have the entire pile collapse on the Bird. The Bird says the company slogan, "It's Kenner -- it's fun!"

The Gooney Bird puppet used in the commercial was later introduced on Sesame Street as Little Bird.