Dear Crystal, While many 6-year-olds, 16-year-olds, and even some 26-year-olds love Bounce Houses, it does ultimately come down to personal preference. You may want to ask your 6-year-old. As for them going on together, as long as they both weigh less than 100 lb each, the inflatable can definitely support them both, but in general, when it comes to family scenarios, it really comes down to common sense. We always recommend evenly matched players bouncing together, with evenly matched sizes, ages, and skill sets. Sincerely, Blast Zone Support