What are the materials you used to make this? It looks amazing! My poor little ferts cage is soo small... I am feeling so guilty, but I cant find any cage that I like!! Also how do you keep them in there? My little girl is like spiderman she can climb anything. Her favorite thing to do is climb up her cage and sit on the top... of course then she is stuck, but I think she knows that it irritates me so she does it anyway and then looks at me like ... well, now you must put me down so I can do it again!