"We love this new cage for our hamster, as it was hard to fit all her toys, her wheel, her hide-outs, and her chewing treats in her 1st cage. We are going to make this playpen her permanent home--If you need something underneath it to protect your floor--a large plastic, shallow tote will work for that. And if you want a top, which you would if it is to be their home--just go to the hardware store and buy a piece of similar wire--take the measurements with you and there you have it. A new, larger home for you beloved pet."