there's no way I would put a child seat back there at least not with the thin partical board that they use because it is for weight reduction and cannot support alot of weight. Now if you used like 3/4" plywood and retraced the kit onto it and reused the carpet on the new plywood if might work. Oh, you would also have to cut 2 notches where the seat belt clips come through the bottom of the seats. I still wouldn't do it though. Just doesn't seem safe to me.