to quantify something, it seems you wish to expose your 8 yo, to safe firearm handling? if so, then nra's eddie eagle is not what you are looking for at all. this program teaches a child k-4:
quote The purpose of the Eddie Eagle Program isn't to teach whether guns are good or bad, but rather to promote the protection and safety of children. The program makes no value judgments about firearms, and no firearms are ever used in the program. Eddie Eagle is never shown touching a firearm, and he does not promote firearm ownership or use. The Eddie Eagle Program has no agenda other than accident prevention - ensuring that children stay safe should they encounter a gun. unquote.
http://eddieeagle.nra.org/
i shan't discuss if an 8yo is developmentally capable of understanding these concepts as each child is unique in their development, or so their parents believe.
my suggestion, find him a cub scout den in the area and your family participate as adult leaders. this avenue has a socialization side and starts children using BB/pellet rifles and youth archery under adult leadership (you) following 'approved' criteria. additionally, i know other children in the den and pack might benefit having a male figure (you) in their lives.
ipse