What are these eggs???

[Jdc361]

My big sister works at a preschool and they Are doing an egg incubation with the kid. She has no clue so she asked me, considering that I'm the only chicken enthusiast in the family. I know this is hard because the eggs are different sizes and may be different breeds but please try your best to help identify some of these eggs

 

[WalnutHill]

They are chicken eggs. At least five are Bantam eggs, and the others are all from brown egg layers. But it's really hard to tell what kind until they hatch!

 

[Jdc361]

They are chicken eggs.  At least five are Bantam eggs, and the others are all from brown egg layers.  But it's really hard to tell what kind until they hatch!

Ok

I just thought maybe the color could narrow the options down for the bantam eggs. I knew the large ones were a long shot!