This looks very similar to my first incubator - I also made one from a styrofoam cooler.
Only thing I would change is it doesn't look like you have anything controlling the temperature, which could be a problem if it gets too hot and the temp spikes and there's nothing to control that. If you don't like wiring, my first incubator used a reptile thermostat to keep the temperature steady - you just plug your lightbulb into it and does the rest.
I (me) was the thermostat for that first hatch and it was STRESSFUL! 16 of the 17 eggs that went in hatched but I had to watch that thing like a hawk! We ended up putting a camera on it so we could check the temp and humidity when we were gone! I will DEFINITELY be taking your advice on the reptile thermostat for my next batch of eggs! Thanks!
Looks like a nice coop for a few chickens. The conversion of the swingset was neat to see. I would swap out that chicken wire for hardware cloth, or else you could have issues with predators.
A good article about bathing a chicken before a show. I might add something about when you let it go after the bath, don't let it go back free ranging in the mud, haha.