We went to Winter Wonderland in Hyde Park, London yesterday.
We spent most of the day there (with a brief detour to the Shrek Adventure) and had a great time even though it was January 4th. Have to say, with Christmas being over it wasn't overly crowded, which made it a better experience. Very expensive though. The kids rides were about $2, adult rides $3-5, and the beer was $5 a pint! It had the (now typical) Bavarian theme so the food was fairly good.
It was about 3C but the sun was out and the weather was about as perfect as you can get for winter. As mentioned, the food wasn't bad. For lunch I opted for a lamb Shawarma. Got a funny look when I asked the guy to pick out the cucumber from the salad