There are several shopping malls, museums and leisure centres in Odaiba, it would probably make a great day trip with the family. We headed over there on a grey Saturday afternoon and really that giant Gundam was the main reason why we wanted to spend an afternoon there.
There are many ways to get to Odaiba. We took the automated Monorail, Yurikamome, so make sure you go right up to the front of the Train for a great view across the Rainbow Bridge.
Head round to Odaiba Decks shopping mall for their illuminations on the 3rd floor. These lights are actually on all year round but of course it feels lovely and festive around Christmas time.
We left before the light show on the Gundam but glad we managed to snap a pic of it in the dark.