Atv 4×4

What are the recommendations for places ATV/Quad/4×4 2?
I love myself and my son in ATV, but he is a little young to ride one (5 years), which is the best of two seats on the market now? I also want a 4×4 utility quad
I have never seen a tandem. I know you can buying a shelf back seat. We have a Kawasaki Brute Force. This is like the seat we have. http://www.opticsplanet.net/tamarack-lounger-box.html And really that young people is not that … you can buy a 50 or 90 for him to ride. They have the governors that can be adjusted. My 4 and 5 year old nephews are in favor riding in them. So has the governor on them more and can go up to 30 mph. They have accidents, but What kid does not.
atv 4×4