The AM monsters (Anything Muppet monsters) are a group of faceless Sesame Street monster puppets whose identities can be changed by altering eyes, noses, tongues, horns or other features as required. The puppets are similar to Anything Muppets in their simple design and interchangeable identities. However, they are also like the Whatnots used on The Muppet Show in that there is usually only one of each kind of monster puppet, whereas there are more than one copy of most Anything Muppets.