Found out my 9 yo son has a pretty good aptitude for archery, so we try to take a trip to the range on a semi-regular basis.
After last session, I let him shoot my M4gery. Had him load round into mag, lock mag, close the bolt, take safety off, aim, squeaze, put safety on, drop mag, roll a round into the mag, then repeat the whole process. After 2nd time through, he said "hey Dad, I got this" so I just stood by and handed him single rounds.
Great time for both of us.