After making our way through herds of school children, we made it downstairs to what appeared to be a day creche of under 6's. Kid everywhere, urgh.
It was far too crazy to let Lil crawl riot so she sat and played with the giant Lego (much to Daddy's delight) and Roddy joined in.
After half an hour and a quick look around the History Museum, we found solace at the nearest alcoholic establishment (much to Lil and Roddy's delight).
I'd definitely recommend a visit to The Garden in the Science Museum if you have an under 6. Just be sure to dress them in armour. The kids in there like to play rough...