We live about an hour away from the centre of London by train and I want to take my 7 year old, 5 year old and 18 month old up to town to do something fun, that won't cost a huge amount.
We have done the Aquarium, Science museum and Natural History museum in the last few years or so. Ds has recently been to the London Transport museum and the dds and I have been to the V and A recently too.
You can see why I am running out of ideas!
Does anyone have any recommendations for me?