Flexwatt in the back of the rack.
It runs along the bottom up the side then across the bottom, up the other side.
a tub set up with hides. One on the warm side, one on the cool side.
Made these out of cheap dish tubs from Walmart. $3 each. They have a couple of different sizes. The large one fits my largest girls and even fits a 6-7' Carpet
A hide used as a perch.
Hope that helps.