In general, most of the standard sized Bounce Houses and Combos can have (6-8) five-year olds. Add a couple more for the larger bounce houses. For older kids, decrease the number of riders. Much of it depends on how excitedly the kids are jumping and being observant of how they are playing together. For safety, have similarly-sized riders jumping at the same time. The standard bounce houses and units with “Kid” in their title are not recommended for adults. However, the interactive, giant slides and larger obstacle courses are great fun for teens and adults. Check the rules printed on the front of each inflatable for details.