Martin P. Robinson (born March 9, 1954) is a puppeteer for the Jim Henson Company. He originally built, designed, and performed the puppets for Little Shop of Horrors. He is perhaps best known for his work on Sesame Street. He has performed the characters of Telly Monster, Slimey the Worm, Mr. Snuffleupagus, and Tony The Turtle on the show for more than 20 years. He also performed the character Riff on Allegra's Window, and was an animatronic puppeteer for Leonardo in Teenage Mutant Ninja Turtles. He is the puppeteer responsible for training the puppeteers on Sesame Tree.