Backpack...

My SD is going into Kindergarden this year. I have gotten all of her school supplies and her school clothes...except for a backpack.

We are having so much trouble finding a backpack for her. She is 28lbs and 41" tall... all the backpacks SWAMP her. The smallest backpack I could find that actually half-way fits her on her back is too small for all the things she needs in the backpack. The only one that I have found to fit everything she needs goes from her neck to her ankles. If she were to put a heavy book in it, she would topple over!

Does anyone have any suggestions? The backpack that I found that fits her (mostly) is big enough for her school supplies and a book if she were to get something from the teacher or library, but we have to have a baggie with a full set of clothes in it on Wednesdays and every other Friday for when her biomother picks her up. And there is no way I can fit all the supplies and the baggie in there on those days. So then my option is getting her a backpack that is 10x bigger than she is...

does anyone have any suggestions? any smaller sized children having a decent backpack that fits everything?

Note: the only supplies she has to have in her bag is 1 folder (figure about a 1/2 in binder once we put in all the paperwork in the pockets and the "agenda" in the prongs), 1 comp book and her pencil case. Plus any books she takes home. She is only allowed 2 books at a time. Then a baggie of clothes on certain days.