Inside Dartside's arena, players engage in some perfectly harmless—but still high-stakes—warfare. Their battles are fought with Nerf-style dart and disc guns, a safe alternative for kids who are too young for paintball and too old to just squirt each other with juice boxes. Bright colored boxes edged in glow tape serve as obstacles during games of tag or capture the flag. Up to 50 players can do battle at once, with both adults and kids as young as 5 joining in the fun.