This was a children's TV show in the 60s and 70s. Hoppity was a wooden puppet with one leg shorter than the other (poor thing). That didn't stop him singing though, with the theme tune going along the lines of, "Dear old hoppity, dear old hoppery..." And whenever his singing slowed down, Sara the girl in the show would use a big key to wind him up again (phew!).
Do You Remember Sara & Hoppity?
Do You Remember Sara & Hoppity?