B.B.
Completely normal, and good, too! He's not just sitting there like a zombie staring at the tv. He's actually interacting and understanding what thery're doing. He's also pretending to be/do something else, which is good for creative play. I like the interactive shows that gets kids moving and involved rather than the ones just for entertainment, especially for such a young child.
I agree with the last poster about PBS kids! They have such wonderful, interactive, educational shows!! My son only gets to watch a show a day, and I try to vary which one that is. You can go to www.pbskids.org and check out what shows they have, and see which one you like (my 2 year old loves Word World, where they talk about letters and "building words", and of course, "Sesame Street"!). If you have a set time of day for tv time, then just record the show (dvr's are great for this!) and have him watch it when you want him to.