Two of my customers have small children. One customer, who I am friends with will let the kids be out while I am mowing. This family has 2 boys that are both very intrigued with mechanical stuff. I have sent out letters to customers about safety, but after a while I'm back to square one with the kids getting as close as 10 feet of me on the mower. The parents act in this way too. This just isn't safe as I know the blades are spinning 180mph at the tip. I have thought of making a simple video showing what a rock can do. I have thought of mailing out a letter printed on red paper just on the safety issue. Does the OPE or some other organization sell a video that I could buy cheaply and send to customers? Any suggestions?