I have not been in London for a while, but I know that as far as plays and musicals concerned the following will be appealing for all ages:

* Chitty Chitty Bang Bang * Mama Mia (The Abba Story)

More information can be found on http://www.ticketmaster.co.uk

Have fun!

Bard Arroyo de la Miel (Spain) http://www.apartamentosmundial.com