I took my 4 year old up with trepidation the first time. To my surprise she didn't want to land after one circuit at Swansea.
The second time she went up was from Rush Green where you have to bumble out from under Luton Zone. She found this bit boring. Once at 4,000' she wanted a go. I must have force fed her the Battle of Britain films once to often as it was stick back and full right aileron. She laughed like a drain and ended up cackling her head off as we pulled out of the ensuing dive. Back up to 4,000' and do it all over again. She was quite cheesed off that we had to go home after 40 minutes or so and gives me grief every time I go flying without her. Now I'm torn between taking her flying as often as possible and risking her getting bored and rationing her flying to keep the interest level up.