You've got to make it comfortable for them when they are that young. If the bugs are bad, he may hate and not want to go again. I agree with the short trip idealism and the intent being fun. Find some snails, pick some "flowers" for mom and let him watch the squirrels for a while before taking the shot. I agree with Justin on the age 10'ish timeframe. I'd sure get him out in a blind next year during turkey season, maybe even this year during deer season when it's not too cold.