I allow my kids in the shop but require safety glasses and hearing protection when I'm running machinery. They are instructed to sit at or near my desk during machining operations. They have also been instructed regarding barging in the door without knocking or otherwise entering slowly and at no more than a normal speaking volume level.
At timesI will lock the door if I am feeling jumpy that day forcing visitors to call me on the phone for entry.
Kyle in K'zoo
Screws are kinda like knots, if you can't use the right one, use lots of 'em.
The greatest tragedy in life is the gruesome murder of a beautiful theory by a brutal gang of facts.