Morris Fraggle was a background Fraggle on Fraggle Rock. His performer, Terry Angus, gave Morris glasses so that he could more easily locate himself in the monitors during filming. (He makes an appearance without glasses in "We Love You, Wembley," playing the saxophone.)
Terry Angus originally conceived of Morris as "a cub reporter for the Fraggle news. So in the "Marooned" episode, check his pocket and you'll see that he has a pad in his pocket. It wasn't long that I had dropped the reporter idea and he was just my own background character."
In an interview about Morris, Angus joked that yes, he did perform a boy on the show.
Terry Angus is still in possession of the Morris puppet.