Colorform pieces include Mr. Hooper, Gordon, Susan, Prairie Dawn, Ernie, Bert, Oscar the Grouch, Grover, Cookie Monster, Big Bird, Little Bird and Rubber Duckie. Herry Monster appears on a televsion set. File:ColorformsSesameStreet2.jpg|inside Image:Sscolorforms.jpg|Colorforms Sesame Street in the 1977 Colorforms catalog.