DD and I go all the time we aim for once a month at 12 she moved away from musicals into more traditional theatre and has she's enjoyed....
The Ocean at the End of the Lane - more grown up themes, puppetry, adaptation of a Neil Gaiman book, Charlie Brooks is fantastic baddy.
Animal Farm - this was puppets and fantastic
Lord Chamberlain's Men - Outdoor traditional Shakespeare production - Hamlet this year
The Woman in Black - fantastic, just two cast members and a couple of jump scares, she had read it at school so nice accompaniment
Hamilton is fantastic and tends to attract more young males who wouldn't necessarily be interested in a traditional musical, it is beneficial to know the story of Hamilton and hes place within the American Independence to fully enjoy it. There is a accompanying Hamilton musical book. The actual biography it's based on is huge with teeny tiny font so wouldn't recommend that unless he loves history.
Six - Tudor Queens experience with HVIII more of a short music concert
Inspector Calls - she loved this and does it for GCSE next year.
Young Frankenstein - a little bit risque but otherwise enjoyable.
Bonnie and Clyde, musical booked for March
Sweeney Todd booked for May
Birdsong booked for November, my favourite book and ties in with school WW1 work.
These were all at our local regional Theatre and have now headed to London if that's where you are intending to go.
The Play that Goes wrong crew do several great shows.
A magic one produced with Penn and Teller I can't remember the name,
Grown Ups - following a group of 'children' from nursery to school reunion
Peter Pan goes Wrong
They also do an improv show in the summer which is great and the audience decide the show - there are a few groups that do this.
The same team had a series on BBC which was great I think it was called The Show That Goes Wrong and might still be on iPlayer.