you know what, I bet that dolls house doesn't look much different from ones that cost £50+ - and if you'd spent that on her, would you think she was 'deprived'?
A couple of Christmas' ago, I was trying to work out what to get DS then 3, and decided a role play shop would be a good idea (the sort of stall one with play fruit and veg he could pretend to be a shopkeeper with). I was looking at ones in Little White Company and Jo Jo Mamon Bebe for £150+ then someone on the christmas bargain threads on here linked to a wooden Asda one for £20 - it looked very similar to the 'posh' ones, although it came without toy food, another £10 on food for it, and I had his Christmas gift that looked just the same as the £150-£200 ones. (And if I'd shopped around, I might well have got the toy food for a lot less).
I had a similar angst of 'is this enough' because we'd set a large budget for his gift, and I'd only spend £30. But as DH pointed out, if I'd bought the expensive shop, I wouldn't feel it wasn't enough so why just because this cost less but was pretty much the same thing, did I feel he needed more gifts?
(those days of massive budgets have gone for us now sadly!)
You've bought her a wooden dolls house. that's a wonderful gift, you've got a bargain, that doesn't mean you need to buy more. (And you could ask other people to buy her some furniture to go in it)
You're getting your DS an action figure, again, just because you're spending a tenner on it, doesn't make it any less of a gift than one that cost £40.
If you have a little left still in your budget, (or other family members to buy for still) I highly recommend hanging out on the Christmas bargain threads in the Christmas section on here, there are some very savy shoppers on MN who can do the hard work for you! 