I think that you should take both of the kids hunting. I first started taking my boys out when they were 4 and 5. I have a ground blind so that they could still move around if they got tired of sitting. I also would bring some coloring books and crayons to help keep them occuppied when we weren't seeing deer. Also, don't plan on hunting all day. Usually they are good for about 3-4 hours before they really want to get going. This year I plan on taking my two year old daughter out with me. Make sure that you have fun when taking them out and don't be all serious because that will turn them off from wanting to go with you again.