Found my old playpen from when I was a child and I thought it would be a good little space for my chin Weena to run when I wanted her to get exercise but also wanted her to be contained while I was busy with chores and homework (still in college). Of course, and I knew this would happen, she wants to bit through the mesh on the side and find her way out. I was wondering if anyone had any suggestions of what I could line the sides with. It doesn't even have to come up very high, just about 9" or so....something chin friendly but also something that would allow me to see in and watch her play.