This doctor's office staff becomes the Yip Yips from "Sesame Street." | This pediatrician's office rocked the group Halloween costume by going as the Yip Yips from "Sesame Street." | By The
How To Make A Yip Yip Costume? - Wayne Arthur Gallery
My wife's hand made costumes. Sesame Street's Martians (Yip Yip) : r/pics