i have been trying to help my son break the habit of picking up random small objects and chewing them, such as pen caps, small toys.....anything really. he started doing this with the collar of his shirt when he was younger, i didn't worry so much because he couldn't choke on it, he always had a wet shirt though. my son is 14 now, and it is a little harder to watch him all the time, he attends general education classes at school, even many honors classes, with one period to help with his social skills. my point is, i can't watch him all time like a small child where you have to be very vigilant that they might put something in their mouth, and most teachers for his age group probably aren't looking out for that. last year, he found the cap of a flash drive at school and decided to chew it, started choking, and the teacher had to perform the heimlich maneuver on him, in front of the class, he wasn't hurt, but very embarrassed and crying and upset. he's had a lot of trouble adjusting to middle school and has no friends, so the incident just made it harder on him. i'm having to constantly tell him take that out on your mouth, it's not clean, or i don't want you to choke. i think he does this to relieve tension, maybe he's nervous, or just bored. anyway, i know this is a little long, but if anyone else has had any experience with this i'd love to have your input.