DH has been eyeing this old non-working dorm fridge that's been taking up space around here for years as a potential incubator/hatcher. The compressor gave out after my younger son left college. The nice wooden MegaBator worked well, but the top, being made of pieced wood, would warp some in extreme humidity and DH wasn't happy with that part of it, so he pirated parts from it to make this Fridge-a-Bator. Being super insulated, I'm hoping that it will work well and if we come across a heating unit rather than a lightbulb, he'll change that part of it later on. There are a few airholes around the bottom and a hole in the top with PVC pipe and a winebottle cork as a stopper to let in air and humidity out as needed.