Arrives already pre-assembled, just need to open it and give the form you want. The orange plastic screws on top of each joint section need to be tightened with a clamp, otherwise hands only it's not firm enough and within 10 minutes of play the Little One was pushing the barriers far far beyond a rectangle! =D Very great price at 115$, about 45$ less that the big a to z river. Couldn't be happier, Would recommend warmly.

This play pen is so great! Super easy to assemble, we even purchased additional panels and it was super easy to add on. Our baby is only 7 months but does the trick to keep her safe while playing. We’ll see how it holds up as she gets older. As other reviews have mentioned, the locks do loosen if they pen is moved or bumped but as long as you keep an eye on it I don’t see it being an issue. Super happy with it! The shipping was also great and speedy!

Great quality. Just ordered extra just in case.

The child has not been able to escape...yet

Good size and easy to set up. Used it for my dog.

Fantastic play yard, the ability to shape shift without taking it apart is fantastic. My only complaint would be that the plastic screws do not stay tight, keeping the shape intact. I’m constantly having to retighten. Overall, my little one love this, pulls himself up and peeks over, the cutest!