Fwiw my son's first trip was when he was 6 and thoroughly enjoyed it then. WW is already great, why postpone. If you love it and anticipate loving the expansion, go back again. I just worry as kids get up in the teens, because schedules and friends become so pressing, and I know that I was a moodypants by 16 that would have acted weird. And I don't even want to talk about what I was like on my 13th b'day. Shudder.