I think one of the reasons panto is such a beloved art form in the UK is that many people have fond childhood memories of attending. It's also an art form that, like current animated films (e.g. Pixar's best), can accommodate multiple levels of humour simultaneously aimed at both adults and children.

Mudcatters would especially appreciate the traditional singalong, often of a comic song, towards the end. I remember singing along, when I was very young, with the great Norman Wisdom (playing his trademark slapstick tragi-comedy as either Buttons in Cinderella, or Wishy Washy the laundry assistant in Aladdin).

https://en.wikipedia.org/wiki/Buttons_(pantomime)

My friend claims his favourite childhood memory is of singing along with comedian Les Dawson as a pantomime Dame. For those who don't remember Dawson, I can recommend the first three minutes or so of this archive footage of his non-panto singalong on this 1970s tv chat show.

https://www.youtube.com/watch?v=uMOrsWxh5mg