I bought a playpen at Petco so that the girls could have a space. As you can imagine, they both are escape artists and I have to keep an eye on them. I added a Fisher Price doll house that my Mom had for the grandkids and they LOVE it! Toda, I took the house out and I sat in there with them. They climbed all over me. It was kind of neat. The run around a lot and aren't too snuggly, but I've only had tem for two weeks. The already take treats out of my hand. I find myself anticipating my "rat time" every day.