I am a first time mother with a 14 month old boy. I would love to go to some exhibitions at the British museum but I am not sure how I can fit this around my baby's nap (it takes about 50mins to get to London). Are there any crèches in London where I can drop him off for 60-90mins for his nap? I could get a babysitter and leave him at home but then I lose half a day with him. I swear I used to see crèches around when I was a teenager but now I have a baby I never see any.