Off to London next week with my 6 year old, staying overnight. We're meeting friends during the day, but have the evening free (Wednesday). Any ideas what we could do? Did think of seeing a show, but Frozen is not on that evening and we've seen The Lion King. We have until around 5pm onwards to occupy ourselves! Any good evening kids stuff? I don't mind him staying up later as a one-off. We rarely go to london so I want to maximise our time there! Thanks!