My king's favorite hide is under a piece of driftwood. You can grab some outside and bake it for a bit in the oven to get rid of germs or pests. My corn on the other hand loves her tupperware box that I drilled a hole in the lid. After drilling the hole, I simply burned the rim with a lighter to make the edges smooth. Also, it's usually nice to keep glass bottles around for babies, of course, tinted. If you know someone who eats coconuts, Grab half of the shell and just cut open a door~ viola! Almost anything works.