We rented our first "Tom-Car" in Kauai when the kids were three and five years old. The grew up with a Polaris Ranger and my son would literally fall asleep in his infant carrier on long trail rides in Arizona. The kids just love to be out on an adventure and Karts are a great way to experience it all together. We are looking at getting 2 two seater go-karts now instead of our four seater go kart because we find the kids have more fun when they can see what's out ahead of them.  - Happy Trails!