DD will be 5 on Christmas Day.
We're hoping to do a special day out for her between Christmas and new year - it's fine to be Christmassy but doesn't have to be.
We're in central London so have done lots of the obvious stuff (natural history museum, Young V&A etc) a million times. We could travel out of London if it's a fairly short journey though - we could do car but better if it's public transport.
We'll also have our 2yo with us.
Any ideas?