In reply to LastBoyScout:
I think that's probably the choice - super stable one with poles (Littlelife being by far the most common, although I think Nomads made one that took up a bit less space at some point), or a pop up one (that's far easier to put up - though not necessarily down
) but could be capsized or rolled around the room by a determined 1 year old if they're that way inclined!).
Probably depends if you want to be able to safely leave an awake and not keen to go to sleep child in it, or if (like us) you're only intending to put them in when they're about to drop!