When your baby is a newborn putting them low to floor can cause major strain on your back so you'll want to shop for a playard that has two levels so you can have them higher when they are younger and then move them lower when they learn to roll over. This model from the popular Graco line does all of this at a reasonable price and has some added features like a mobile and pockets on the side to store, diaper, wipes and such.
Love this pen, it's the best. Easy to assemble, colorful, has a nice open feel so our baby isn't in prison and cut off from the family activity. BUT BE WARNED this playpen has a design flaw that creates a choking hazzard. The play panel has some busy gears and a button baby can push to squeak. This button can be easily pulled off by baby and will be in two small parts, the button and the plastic squeaker. Both parts are small enough to cause a choking hazzard, our 11mo had the whole button cap in her mouth. So before you think about turning your back on your baby in this pen for a second, I'd recommend removing these parts yourself. Great play pen in every other way.
Nice to keep baby out of trouble at home. Once he became mobile we had to do an "upgrade" as we noticed he was starting to hit his head on the X shaped metal bars. We tried some alternatives but the best so far was wrapping the metal bars with pool noodles (see picture). You'll need 8 pool noodles and some cuts (buy some extra in case you mess up). Use 2/3 of a pool noodle to wrap the internal bars and the remaining 1/3 to wrap half of the external bar. The pieces will also need a longitudinal cut along the length to fit the bar in. You'll also need some small cuts in the middle of the longer piece to fit the center rivet, where the mesh is attached to the bars. We got the pool noodles at the dollar store nearby for less than $10 and since ... full review