Heh, I'm now 22 so I must've been about fourteen when I read HP, which is odd, because I hadn't really thought of them as 'books from my childhood' - along with things like LOTR and Famous Five, and even His Dark Materials - so much as books I came accross much later.
I live in the UK, and I go by anotherusedpage. The books were originally bought for my kid brother, who is five years younger than me, but he never liked them much.