I made up a new/old fashioned way to teach self control:
Books on the heads at their seats. If you are under control, you may remove your book. If you feel yourself getting out of control, replace the book. If I have to remind you to be in control, you have to look at the clock and keep the book on for one minute. Each loss of control adds a minute (up to 5).
All I've done so far is let the kids practice with books, they seem to like it...we'll seeeee.