My guppy babies are growing well

one of my female guppies delivered 4 little ones on 02/02/06, now they are 5 days old, active and spoiled, lol! I tried to figure out their sex, I think 2 of them are definitely gals, one boy, and the 4th one not very sure. They love egg's yolk. Hope the big ones don't jump into the cradle and eat them all~