Today I did an egg project with my class to help them understand that it doesn't matter what color your skin is - inside we are all the same. I took a brown egg and a white egg and we talked all about the differences and similarities. Then we cracked them into a bowl and they are supposed to be the same... but the yolk from the brown egg was orange and the yolk from the white egg was yellow! How do you explain that one away... kind of killed the whole point. Any suggestions?