Granted, I'm been known to still carry around my SkipHop bag even though my son is 3 - I just love all the pockets! But lately I've been trying to streamline. I came to realize that I never use all the stuff I have in there - it was a hold over from my son's baby days when you were never sure what on earth they were going to need/my girlscout over-prepared-ness! So now I just keep extra clothes, diapers, wipes, extra plastic bags, sunscreen, small toys and books in the car so I know its all out there if I need it (and usually I don't). If we go on a walking errand and need waters/cups & snacks, I just put them in the stroller or let my son carry them himself. I came to learn that the more I had on my person, the higher the expectation for my son that he was going to get something if we were out...like the bag is one endless snack holder. No more! My only other suggestion is to find your daughter a childs-size backpack and let her carry some her items herself.