Zippy

Zippy the Pinhead is a fictional character who is the protagonist of Zippy, an American comic strip created by Bill Griffith. Zippy's most famous quotation, "Are we having fun yet?", appears in Bartlett's Familiar Quotations and became a catchphrase. He almost always wears a yellow muumuu/clown suit with large red polka dots, and puffy, white clown shoes. (Other forms of attire may be seen when appropriate to the context, e.g. a toga…Wikipedia