We rented 2 atvs for 5 adults and 3 kids, 7-13 years old. We did a morning 2 hour ride which was long enough for everyone. We were given a good safety talk and fitted with helmets. Our long clothing was helpful as it got dusty and at one point a bit of mud.The tour guide stopped at every intersection, no fear of getting lost. We had stops at lava fields for exploring and pictures. I would recommend this length of trip for kids as they never got bored.