DD is 17 months. She currently sleeps in a grow bag in a cot. The mattress is at its lowest level. When I went in today she had unzipped the grow bag. I think it is only a matter of time before she tries to climb out of the cot and I don't really want to hear a thud followed by crying one morning. When did you move on from a cot if there wasn't another baby or any other practical reason to move on? And what is the next step? Is a toddler bed a waste given that we have a single bed already? I think DD may be too little to be trusted to be able to get out of bed and toddle into us in the morning. I also am not sure if her sleep would be disrupted by a move.