First time mommy here! My husband and I are making a list of what we really need for baby, and today we were glancing at pack-n-play type portable playyards in the store. They seem so big and pricey, but I know lots of parents swear by them. I hope this isn't a dumb question...what do you usually use pack-n'play's for? Are they useful to have? Does size matter, and at the end of the day, are they something you can't live without for the first few years? Or are they just nice to have? I know that they are used for sleeping and playing in obviously, but how often did/ do you use them with your baby or young child? I know its a silly question but husband and I are totally new to this whole baby world!