What is in this image? Describe it in Simple English. As plain and simple as possible. No complex words, no long sentences. Still make sure to describe everything in the image.

This is a drawing of a big mushroom with white spots. On top of the mushroom, there is a small bird. Under the mushroom, there are two funny creatures. They look like they could be rocks. They wear party hats and one is upside down. They are in grass.