DD is 11mo and pretty mobile. No matter how tired she is, putting her down in the cot now involves standing over to reposition her as she endlessly rolls onto her front and pushes herself up to sitting / standing / crawling / cruising. Eventually she will wear herself out and she will roll onto her front, flip down and go to sleep. The problem is that she doesn't know how to lie down from a sitting position (especially problematic in the middle of the night when she pushes herself up in her sleep and wakes up sitting, with no idea how she got there or how to kid down again). When do babies learn how to lie down?!