I've been to watch a couple of tv programmes (ones which have a studio audience) being recorded before and it's good fun and free, but this one is for kids aged 9-12 years - mine's only 4 months old! - so thought someone else might appreciate this one...
www.applausestore.com/applausestore-book-show.php?id=68&bid=1
Tickets are free but obviously getting to London won't be!