The incubation of any egg is the result of a constant heat source along with the required humidity. ANY resource that combines the two will result in the hatching of your eggs. The most unlikely incubators that have heard of is one of a person keeping the egg under thier armpit for the duration. EEEW. Another was in the cleavage of her bra. Hey, temp was right and humidity must have been too. LOL. Just goes to show that you can make an incubator out of anything.....