What product would you all suggest for a climbing log? I was at the petstore & I bought this thing that I thought seemed like a good idea at the time but once i got it home & put it in the tank, i realized that it was just not going to sturdy enough to support her body weight & that it would probably end up tipping over on her when she tries to climb on it. What is a good product that is sturdy but not overly bulky to take up too much room??