got a new rhino with a extra seat and a 4 wheeler that i leave at the house becasue no one else to ride. But my boy is 3 and he has been on a couple hunts. We have taken other kids around 6 and they loved it. We usually let the catch dog go from further away and drive right on top of the catch if possible for them. But he will love it and you will be suprised what a 6 year old can do in the woods when hunting.
But i dont know where you live but i may be too far i have places around 1 - 2 hours from dallas in any direction. Just let me know and your are welcome to come and hunt.