Pop-Up Muppets is a set of two Sesame Street activity books made in 1971 by Random House.
Each book has puppets made of stiff paper that can be punched out and folded into shape. When a tab on the back of the paper puppet is pulled, the character's mouth moves.
The first book, The Muppets of Sesame Street, contained puppets of Ernie, Bert and Cookie Monster. The second book, More Muppets from Sesame Street, had puppets of Big Bird and Oscar the Grouch.