SAFETY!
We have been doing that for our school for a couple years and the one thing that is so hard to do is keep the kids away from the mill when running it. We all know they are very safe but with lawsuits and lawyers being the way they are, I would suggest to keep them way back if your going to demonstrate any sawing. A simple piece of sawdust in the eye can lead to a very expensive legal matter, even if there was no damage to the eye.