This is a nice sturdy climbing toy. It's got no stray bits of plastic that could pose a danger. It's ready to use right out of the box. I actually purchased this for my bearded dragon. I think this could work well for many kinds of lizards. It's not too high so falling isn't a risk. There's no risk of catching claws as the holes are nice and roomy. It adds a nice bit of interest and my dragon seems interested in it. It might also work well for small mammals, provided they're not interested in chewing on it.
