those are cool. I can't ID them, tho I'm sure someone here will be able to. It does help tp know what area you live in. Gives a refrence point. local geology is important in IDs. I think the best route to ID'ing rocks is the good ole Audubons Field Guide To Rocks. & anytime you come across a book on rocks or geology grab it. I hope you will be sharing this hobby with your little one. It's a great way to teach kids about our world.
like others said, possible thundereggs, geodes, maybe a limbcast in there. possible dino bone. better chance of id if pics of them wet. or i can slice one for you.
I would also add a hardness test. Get a piece of broken window glass. Try to make a scratch on the some of the different faces.
Glass has a hardness of 6 so if they are thunder eggs ( which should be a hardness of around 7), it shouldn't leave a scratch.
I would test a few of the faces with the concentric bands. Don't need to make a big scratch.
Then I would send a coppy of your shots to the people at the Kentucky Geological Survey at the link I sent.
Your rocks are interesting enough that I'm pretty sure you will get a response.
What's your alls thought of me cutting a few of them open w a wet saw I have??
And I'll do a hardness test as well and post my finds and info as well as photos. Thanks for the inputs