Hey have you thought of using a baby carrier. I had one for the front that was so wonderful. I could put my some facing me, close to my chest and just walk away. I realize that you have two to push, but I thought that maybe a foster child would need that closeness because he is away from his mother and even newborns know the difference. Also I graduated when my son became about 18lbs to a backpack. I think the front carrier was so awesome though, because when they are little you hardly know they are there (up to about 18lbs) and you walking lulls them to sleep, gives them security, and you can see them the whole time also. PS, I think its wonderful that you have a newborn foster child on top of all of your other children. How do you do it??? Gods blessings and I will keep you in my prayers.