The Polar Express
**
If you're going to buy the kids The Polar Express - and trust me, despite the Robert Zemeckis direction and sophisticated animation, it isn't one for adults - then it's worth splashing out the extra for this two-disc set, which has a wealth of featurettes and mini-docs. Many of them, unsurprisingly, talk about the pioneering motion capture technique that transferred actual actors' motions into animation. It's very clever, allowing Zemeckis to cheerily chuck characters, even small ones, into danger. But the fact that Tom Hanks plays practically everyone, from the little boy who struggles to believe in Santa to the hobo he meets aboard the titular magic train, makes the ominously oversized Santa (played by guess who?) seem like a motion capture of Hanks's ego. And the queasily sentimental love-song to Christmas will have the sentient upchucking their mince pies.
Extras: A disc's worth, including docs, Easter eggs and a game.