It's the Lion King. I bought tickets for me, DH and the three DC. After I'd completed the whole process, paid and everything, the chap on the phone listed some Ts and Cs (non-refundable, non-exchangeable etc. oh, and children must be 3yo or older). I didn't say anything.
DD will turn 3 six weeks after the performance. She's been to lots of theatre, including Xmas pantomimes (long) and never made any fuss or disturbance.
If she, or the other DC (4 and 6) for that matter made a disturbance then DH would obviously take them out.
I don't think IAB hugely U, but I do have a niggling feeling at some level. What do others think?