Since Steven loves to stand right in front of the tv when watching Raffi, we pulled out a little rocking chair we had for him in the basement. Our basic rule is if he is watching Raffi, he has to sit in the chair. Fortunately, he loves his chair (most of the time) and even dances in it.
It great for him to have seat of his own, and even better, it keeps him from being literally glued to the tv :)
It's also great for watching basketball with Daddy! And for playing peek-a-boo!