She really wanted to do a Science museum sleepover but the next one is August and we're on holiday.
She isn't really girlie (so no make-over party)
It will be a mixed sex group
There will be between 5 and 8 of them
I don't mind getting on the train
I don't mind spending a bit as its her final party in primary school and will be splitting up from lots of friends for secondary.
She doesn't want to do bowling as its been done many times
I really can't envisage a sleepover for that many (we have very limited space, live in a flat so neighbours on all sides, and younger child)
Oh and not Chessington type place, she's not a rides type person.
Ideas please! We're in London but don't mind a train journey.
All help gratefully received.