I am planning on hatching eggs with the kids in my after school program and adopting the chickens out to the kids after they hatch. I am looking for suggestions on what type of eggs should I purchase. I am looking for something that will have a good chance of hatching (are certain breeds easier/more difficult to hatch?), a fairly hearty egg-layer for those who adopt females, and something that tends to like to be around people, kids in particular. Thank you in advance for any advice!!!