I have the packnplays for little kids and they are in separate bedrooms upstairs. If more than three are needed then two end up in my room but quite a ways apart because of the way the room is laid out. Older kids sleep right now on crib mattresses which I put down in our mainfloor playroom (diningroom) They move to the mattresses around 2 or when they are in a bed at home or too big for the playpen either by weight or climbing out. My mattresses need replacing and I still can't decide between going the mat route or the actual cot route. Leaning towards the cots as I picture kids rolling around the room with the low mats. At least on the crib mattresses I only rarely have a child roll off.