While age is a factor, and we do recommend those who are playing be at least 6 years old and above, height and maturity are also important. Our vest and phasers are fairly large and can be often to heavy for younger, smaller kids, so recommend that players be around 48 inches or taller. And our games are played in black light, and while we have done our best to make sure all areas are lighted, there are some very dark corners and insets that combined with the loud music and fog that is pumped in, might make some children frighten.