These things are everywhere. My sons school sent home a letter telling parents not to send them to school with their kids. they are very distracting to the other kids, and depending on what kinds you have, they are a status symbol.

I personally find them annoying and useless.......but I'm pretty old school. I just don't see a real use for them. We used to fidget with rubber bands around our wrists, or flip coins, or roll coins between our fingers. These are a fad and will go the same way as POGS, snap brackelets and other "hot" things that kinda died out after a few years.