I've decided to get all my nieces and nephews books for Xmas this year. Seeing I will have a newborn around Xmas I'm getting organised early. I've got books for most of the kids except an almost 7 year old boy and a girl who u can't remember if she will be 6 1/2 or 7 1/2!! Can anyone with kids around that age give me some ideas on books suitable for them? Ideally I would like to get them a set of books and only want to spend about $20 each.