If you're in London I can't recommend this highly enough. You need to book early as it does book up quickly but it is such a joy and sets you up for the Christmas holidays.
Christmas at Kew
OH and I have a new Christmas tradition, Christmas at Kew. We went last year and it was such a magical experience. This year we went with OH's family and a close friend of mine which meant we were a party of 7 - not idea conditions for taking pictures as it was very busy and it's easy to loose people in the dark so the photos aren't my best but they give you an idea of the trail which we meandered through in just under two hours: