Brace yourself. I took my son scouting at six months with a bottle in my back pocket, of course this scouting trip was for me. I took him on a late afternoon hunt at two years-where he did scare off the deer, but he did see them and loved it. He shot at his first deer at 6 years and killed his first at 7 years. He has killed several more since then. But my son has been exposed to hunting since birth. My thought would be whenever they start getting interested in going is when they should be taken. But don't hunt as you would if it were only you. Take them at prime hunting times to shorten the amount of time needed to sit and better their chances of seeing game, and when they get ready to go- leave. I started taking my son with only 1-1/12 hrs of daylight left. You do have to make it enjoyable (this includes comfort) for them or they will loose interest, and we don't want or need that. They are going to want to get down, walk around and look. Just remember when you start taking kids you have to put yourself second, it's all for them at that point. Different kids are going to take to it at different ages. I'm in the same shoes as you. My brother doesn't hunt and I've been taking his 12 year old for a couple of years, mostly turkey hunting, but has learned a lot about the outdoors, hasn't killed anything yet, but loves every minute of it as do the other four nephews I take. Good Luck.