As these books tend to be short on footnotes, I couldn’t actually track down any such study. And what a study it would have to be: large-scale, “longitudinal,” intensely observational, randomized. Otherwise, how would we really know how much time children had spent in playpens (self-reports tend to be biased), what sort of households the children lived in, not to mention what might have occurred in the years between the time spent in playpens and the time of the reading and writing tests at age 7 or 8? Which left me wondering: Is the fear of playpens all hype? Just a hysterical outcropping of our anxious style of modern parenting?
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.
This thing is great. I have it set up as a wall spliting my living room in half basically. The panels are sturdy so hold up great when my daughter pulls herself up standing against them. As i have it set up as a wall i did anchor it to the room walls byattaching some Velcro to the room wall with a screw at either end then wrapping the Velcro around a piece of each end section. This has allowed me to create a baby safe area with all her toys and then an adult safe area with no toys to trip over, and itlet meget away with not baby proofing the entertainment center.