I built this incubator out of some scrap wood and parts I had laying around with the addition of a temperature controller from ebay ($13) and it works great. I tend to use it from time to time to show the young ones how incubation works and watch the chicks hatch. First I built a wooden box, I made a divider wall with a hole cut on each end of it and glued/ brad nailed it in place. I secured a computer fan on one end and placed a dual light fixture in between the holes in the back compartment. Later I wired up a relay and a temperature controller so that I could get a steady even temp. I built two lids for it. One for the rear compartment and one for the front compartment. The front compartment has a plexiglass viewing window a small computer fan mounted to the plexiglass to help with circulation. I built a second box (a tray) and set it into the larger box and in front of the exhaust side or heated side of the box I put several small plastic tray so I could accurately modify the humidity. It requires 2 plugins to operate but does a great job. I call it the HATCHER. I usually only use it when the chicks go into lockdown. until then they stay in my larger incubator w/ a built in turner. Here are some pics!!! I will have some more of the whole thing (including what it looks like with the covers off and internals showing) within a few days. as you can see I have a small batch hatching right now and the kids are super excited.