I'm teaching my six year old to fly and he is doing well with his duet, but even with a plane that can do minimal damage I am trying to teach him propeller safety. It is the one thing that scares me about potentially moving him up into larger motors. Lipos I can control and I have been teaching him about not draining them zero, but propeller safety requires repeated practice. I did buy him a pair of kids polarized safety glasses, which I highly recommend flite test start selling. Even small propellers can seriously damage an eye. I will be showing him some of the injuries on thus forum to hammer the idea of propeller safety home.