I've posted about this before but,,
I started my son out as soon as he could hold a nerf gun about basic gun safety, then at 5 got him his own red ryder, laying a good safety foundation all the while, after that he got a pellet gun around 8, After proving he was mature enough got a 702 mossy plinkster 22. at 10. As someone above was saying, now after years of no pressure, positive reinforcement , fun bonding time with my lil sidekick I can say he's the safest shooting buddy I got, hell I can clear any firearm, then hand it to him and he will everytime clear it himself, sometimes ill try to get one over just to see and hand him (unloaded) a rifle/ pistol and just tell him don't worry its not loaded,, he'll just look at me like I'm stupid and before anything will clear it himself,, I'll jokingly say I told you it wasn't loaded. He'll say that everybody can make a mistake, even you dad. He got a ruger 1022 for christmas and next one he gets his pistol haven't decided caliber yet but he says he want a 40 like dad, more likely a small wheelgun.
Long post wrapping up, be patient, have fun, positively pound in SAFETY SAFETY SAFETY and you will have the best shooting buddy ever.
Ps. Here's a pic of last christmas night after all day holding, examining, absolutely proud of his new 22, his first real gun. He fell asleep in the livingroom floor holding it.(mag out,, cleared 1k times)