Telly is performed very similar to Oscar. Marty Robinson works Telly's head and left hand, while Bryant Young works Telly's right hand. As for his eyes moving, inside his head would probably be a little lever Marty rests his four fingers on. Everytime he presses on it, and rests off of it would result in Telly's eyelids blinking. As for eating, I've never seen him eat, but he probably has a small hole in his mouth like Cookie Monster once did. As for hopping on his pogostick, Marty and Bryant would hold the pogostick, and bounce Telly up and down, creating the illusion of him bouncing on his pogostick. At least thats what I believe.