SOLVED. YA Fantasy. Kids with powers at some kind of camp, can trigger or stop violence. Everyday world, not dystopian. Starts with girl in France. Spoilers ahead. Read in early 2000s. [s]

[Rainbowheart]

Kinda reminds me of The Butterfly Revolution and The Grounding of Group 6, but I'm not sure there was anything supernatural in either book.

[Kris]

Ashley, I added some details to the header, so your book might be recognized from that description alone. Feel free to edit it.

[Cupcakedoll]