Now before you crucify me. I hand selected straight grain pieces and held a safety meeting with her. Plus she wouldn't stop crying until I let her "pull the lever!" I believe in teaching kids how to, not to be scared of things. Normally this is my 7y/o's job but he was in school so she had to step up and help, with a family of 6 everyone has to pitch in.
http://www.youtube.com/watch?v=nSPrA7rAOQ8
http://www.youtube.com/watch?v=nSPrA7rAOQ8