Good start on your safety plan. Remember 85 - 95% of injuries are the result of unsafe behaviors. The majority of the articles on safety focus on work place conditions. Establish a culture of "We work and play safely" where staff and visitor correct those who are misbehaving.

Maybe my alma mater can be of service, check the links below for info about farm activities you might even learn to raise catfish.

http://msucares.com/

http://msucares.com/newsletters/safety/index.html