We went because they needed a 3 year old boy to model a sheep costume, and it ended up with ds singing baa baa black sheep and being interviewed about what toys he liked. He is 3.3 so I am amazed at how well he did, chatting away for 5 minutes to the presenter.
It's a local channel though so we have a crap reception! They offered him his own show - but ds doesn't realise they were joking and wants to know when he's going back in the frog costume.