Since all the large side-by-sides get all the attention, few know this, but Polaris does make a youth SxS model and its super fun for kids (and adults if you can fit). Personally, when I was a kid, I would have done every chore in the house (and our neighbor's house) if it meant I could have access to one of these. If you have a child 10+ that you feel is ready, this is a great way to get them started with off-roading adventures.
This model allows you to regulate the throttle and as they gain experience you can raise the speed limit. It also has 2 seats, so they can drive around a younger sibling - or a parent can ride shotgun and tell them how to use it!
Visit Polaris's Website: HERE to learn more.