I'll second Plucky Clucks - those are dark legs, Cuckoo Maran!

I've read a lot, but there's no exact way to tell the sex by looking at them at this point. Males will be lighter than females, but you're just looking at fuzz right now!

You'll know soon enough though, they grow so fast! ha ha! I was thinking the other day, trying to figure out if my Salmon Faverolles maybe were not all girls and it was driving me nuts. Then I realized, I'll know soon, and I'm not going to get rid of any of them right now if they're roos anyway! So, I'm just having fun playing the guessing game and waiting. You'll know before they start crowing!

They look healthy to me. Are they acting normal? Butts (vents) clean?
I saw it, but not until AFTER I had purchased one.

Of course, the one I purchased I tried anyway... so couldn't really in good faith return it, and already got the whole deal set up, didn't want to try again and spend another $30 at that point considering the cost of building my first and second brooders! ha! Ho hum. The light works. Maybe next year though! It's such a good idea that just makes sense!
Pattycat - I have no clue! Looks like you've got a good mix there though! What a pretty flock you'll have.