The boys discovered this last year with their cousins. I had no idea what it was so they were instructed to leave it alone. When the boys re-discovered it this year they were told again they needed to be careful with it. I can't imagine the berries would be toxic but I didn't want to take a chance. I would love for you all to take a look at the following photos and, if you can, please identify this plant/berry for me! Thanks!
Here is a wide shot of the whole plant. It grew along our fence line.
Here are the berries against my hand.
Here are the berries in Ajay's hand.
A more detailed shot of the berries.
The boys' hands stained purple after they used the berries as bombs. (Washed off pretty easily.)