Christmas is a special, magical time in our house and yes, normally we do go a bit over the top. However, that's our choice. As some others have said, a lot of the "presents" are practical, and they need them anyway, pjs, pencils, colouring books, clothes, pants and socks etc.
I don't count (I'd go crazy if I did!). They have a stocking, new ones this year which my mother has made, and in there will be a satsuma, chocolate coins, the girls have earrings, the boys have wind up cars, Christmassy pencils, a couple of bits of tat.
Then they have sacks with clothes, colouring books, books, games, dolls clothes a couple of toys etc. my brother gave £30 each child, with which dd1 is having a boombox with docking station, ds1 a camera, ds2 a boombox and cd set, dd2 a cuddly toy and we are still contemplating what to spend the remaining £15 on.
SIL will send a bag of presents which may include a selection box each. I can never second guess her and she never asks what they want or need so its always a big surprise! My aunt (dd2s godmother) also always sends over a bag of pressies, mil usually a present each but this year is giving them euros for our holiday in February.
They may get the odd present from school/dancing which goes under the tree too. My grandparents send m and a vouchers (which I usually save for the sales). Likewise I have an aunt that will send either vouchers or a gift each for the children. I don't expect other people to buy for the children (especially as I have four) but enjoy watching them open pressies when I don't know what they are going to be.
Dd1s birthday is two weeks after Christmas, and both dd1 and ds1 are in panto, where they do a secret Santa or "buy for your opposite" gift giving thing. It's the little extras that are nice. Ds1s panto choreographer also always gives all the children a nice gift.
It sounds a lot I know, but I tend to spread the present opening over a couple of days and they write thank you's and like I say lots of it is needed stuff. This year they are not having main presents as they have all been told that their 'main' present is their holiday in feb.
My mums the worst! She was told no big presents, that went for EVERYONE, and she has a smart camera from my brother, boots and lots of little things. She's the most spoilt!