Things to do locally late Dec with extended family

[Crokes]

I'm looking for some fun things to do for a couple of days during late December but my sleep-deprived brain is on strike!

I'll be entertaining a 3yr old girl, 9 yr old girl , 13yr old girl (and be juggling a 7 month old baby too)...(Not on my own I should add!).

Are there any things locally and/or am I mad to consider going into London (ie. will museums etc be crazy busy as I'd expect it to be in the holidays?). Is there anywhere that would be interesting/fun for all?

Thanks in advance for any suggestions and happy holidays/Christmas!

[lucyA1308]

Tate modern is always good. Musical slide and more in the under 5s zone, for 3 yr old and 7 mnth old. lots of interesting modern art for teens to start getting interested in. Lots of it for free.

[Saffron]

Rumpelstiltskin at the Albany: http://www.thealbany.org.uk/event_detail/810/Family/Rumpelstiltskin

[Crokes]

Brilliant suggestions, thank you. All went well!