I didn't realize how easy this would be to use so it took me awhile to get around to it. I am so impressed by how simple it is. You literally just open up the package and begin to unfold it and it pops right open to this play pen/pool as I have pictured. I bought this as a dig box for my rabbit. I put her in to see how she would respond to being in the play pen. Unfortunately she jumped right out. However that let me know another thing i needed to know. It's not too tall for her so she can easily get in and out on her own. I'm excited to try to get her to use this and will be adding so old clothes, cardboard, and wild flowers, etc to see if i can get her better used to it. If not, my puppies can always use it as a pool for the summer.Oh and p.s. my rabbit is pretty big (like the size and a half of a chihuahua) and there's still plenty room. Just to give you an idea of how much room you'll have. Probably 3-4 chihuahuas can fit comfortably. I have chihuahuas as well if you can't tell lol.