Btw, for all my complaining about clutter pre-Xmas I feel that we've been a lot more rational with the presents. Ds' pile was a lot smaller than last year (thank goodness) - we were very aware that he still had e.g. lego sets from his b'day in Sept that still haven't been built, so even though it seemed wrong to not have any for xmas he didn't - and hasn't missed it.
The only thing he asked for was a lego/superhero videogame, so he had that, then a surprise Transformer that he was wowed with. Then he had a watch (learning to tell time at school), new handlegrips (badly needed for his scooter), a couple of books and a couple of build it yourself science kits (from relatives).
Baby dd (16 months) got this pet toy and she's loved putting little toys in and out of the doors, (and her brother has liked opening and closing the doors for her with the keys) - then as she gets older she can do more with it herself. Oh and she got the ginormous rabbit toy DH got her - which actually she's been using as a floor cushion, so he's almost forgiven for the size of it.
It would have been very very easy to buy them both more, but I think they'd just have been more overwhelmed and no happier for it. There was so much more we could have bought for them, but when you really look at toys its easy to see how repetitive they are.
[disclaimer - we already have squillions of toys - so we're by no means minimalist/virtuous and the kids are very very far from deprived)