Hello all. I work at a summer camp where we serve campers and guests from toddlers to elderly. One of our popular activities is our .22 rifle range. We are looking to make some improvements and I have some questions that I thought you would be helpful with. We have been using steel spinning targets in the past and our rifles are .22 bolt action. What would be a good & safe distance for kids and novice participators to shoot at? What types of targets or companies would you recommend buying from?