I'm so glad you asked this question DeHe. I was going to post something about chewing today, too.
I've been doing some research on "chewelry" and was hoping someone here would have some feedback on how it works for their child. My son chews his shirt, blankets, pillows, and the silicone-type straws on water bottles. He also has some tics, like turning around while walking, humming a specific five note sequence, flicking his fingers, etc. His doctors do not seem worried at this point, but I'd like to at least get him chewing on something other than his clothes while he's at school.
