Yes, your son can legally go hunting with you, but in Texas, if you decide he's ready to shoot when he is 6, he can legally shoot also, in addition to going hunting with you. I forgot if you have to carry his gun or if he just has to be within arms length of you, but its at the Texas Parks and Wildlife web page. There are pictures of 6 year old boys and girls in the paper here every year with some big old whitetail that many hunters wish they had shot sometime in their life, let alone when they were 6.