I started buying and hatching eggs last spring I use styrofoam incubators that I purchased 4 of them two had fans in them and I added a fan to another they have thermometers on top and you put one inside ! These eggs were all shipped thru the mail , I only ended up getting about a 30 percent hatch I put an extra thermometer inside the incubator so I had three total on and in them I found out that the temp from one side to the other were different by up to 3 degrees I did not like that ! Looking back with all the money I spent I could have bought a real incubator and had a better success !