Well, I don't know what they are but they sure are cute! This may not help you right now but in a couple weeks...
Sexing chicks-4-6wks of age
According to UC Davis Veterinary Care Program.
2. Physical Characteristics (4-6 weeks of age)
a. Comb The cockerels comb is medium size and pinkish, the pullets is small and yellowish.
b. Legs The cockerels legs are sturdy and long, the pullets are finer and shorter.
c. Tail The cockerels tail is stumpy and curved, the pullets is longer and straight.
d. Back The cockerel has a thin line of stub feathers down the center of his back, the pullet has more advanced feathering along the center of her back.
e. Side of neck, flank and crop The feathering in the cockerel in these areas is poorly advanced, the pullets feathering in these areas is well advanced.
f. Wing bows In the cockerel the wing bows are bare, in pullets the wing bows
Thanks for the information. We still have to build the run for them. We finished the coop part. I bought some plastic bins at Dollar Tree to use for the nesting boxes as I was reading that they are easier to clean out and less apt to draw bugs from the wood. Any suggestions as to what I should put in the boxes, hay? wood chips? I know they are too young yet, but I'm trying to get it all straightened out before hand.