Used paper mache to make the body for Mike and green fleece to make the shoe covers. 
Used wire from inside a play tunnel to make the body of Boo and covered it with pubple felt. Added clothes hanger and styrofoam balls to make the eyes and a mop painted grey for the hair.
Celia was a dress pattern I modified and made legs out of purple leggins stuffed and added a coat hanger to make them curl on the bottom.  Painted rubber snakes for head.
Sully was a modified dragon patten.