Just Add Air! The AirFort is designed to hook inflates in less a half-minute. When the kids are ready to play, simply attach your AirFort to a standard 20x20 inch box fan and you're good to go - inside! It's big enough to fit several kids. And when it's time to take it down, it deflates almost immediately and folds up into its small stuff/carry case. Glow-in-the-dark Starry Night Fort.