I recently transitioned a 2 year old to a mat in the playroom and he never gets off his mat...just goes right to sleep. I close the blinds, turn out the lights and that's it. Mind you, he is a very easy going child and sleeps extremely well, even through noise. I recently tried to put a 19 month old in a playpen in the playroom with him and it was a bit of a no-go. They played and laughed and then, the funny thing was that the 2 year old went to sleep and the 19 month old continued to play although she was in a playpen. I think if I persisted for a week she would sleep fine there and then eventually I could move her to a mat. I am going to try it again soon once I have the new baby that just started all settled in...don't want to make things too hard on myself! Maybe you could try one at a time?