Thanks again! We will buy a new heat mat and attach it to the bottom and add clutter. He came out to explore last night about 8pm and seemed very happy!
The heat lamp we have has a dimmer on it, but I think we'll get one without and add a thermostat. It definitely gets cold in our house in the winter!
Only question my daughter still has is about the humidity levels. Right now it is 45% on the hot side and 55% on the cooler side.