Can you help me identify my chicks?

[kmdsparrow]

I got these 3 about a week and a half ago at a county fair and don't know what they are. The 4H lady showed me some grown birds that she thought they would grown to be, but she wasn't sure. Is it too early to tell?

Penelope here has very short wings and a cotton ball butt. It's like a big poofball on her rear. She also looks like a penguin at times when she stands tall. The others are able to fly, but she struggles.

This is peteunia. She is very tiny, but pretty bold.

Blanca is the most bold and the most advanced. Yesterday she was on my shoulder in my classroom and she flew off to the floor.
Any help in trying to identify them would be appreciated. They are just so cute and my students are really enjoying them.

 

[carolina chicky]

The yellow one looks like a Cornish Cross...maybe.

 

[goatgirl4008]

The black ones look like black jersey giants. I know there is also white jersey giants . Maybe that's the white one. That would be my guesses.

 

[V Comb]

Top one Im guessing is an Australorp.