Oh yes, I can watch chicken TV for hours!
Many of us aren't completely prepared, glad you are enjoying though.
To be honest, at least you will get eggs before to late in the year (2017)... My June girls are barely starting to lay right now and will still molt come next fall.
It's nice that you already have an out if they are cockerels. You can usually tell by 8 weeks on most pure breed. Mixes can be a little harder sometimes because who knows what size the combs are supposed to be.
Their behavior can be telling also. Boys tend to stand more upright and do a lot of chest bumping. But there are no absolutes.
I would try again in another week or so and see if you can get pics light enough. Also standing up side view is good to see how they are feathering in.
So you think they are mixes of mixes? Not one breed and one other breed? Or rather her chickens aren't pure breeds anymore, so that you would at least know what the possibilities were? It may not be important, but it sure is fun to try to figure out!