We are planning a day trip to London in November with our 2 DC who are 12 and 10. We live just over an hour away, so will have a good chunk of the day to fill. We love the NHM and Science Museum but have done them to death over the years so looking for something else that will capture their interest. DS is keen on going to Tate Britain as he went with school and enjoyed it, but I suspect that won't take the whole day. We're expecting it will be cold so don't want too much outdoor stuff so that rules out too much being in a park.
Interested in "different" suggestions that will work with these ages?
TIA