Kite running is not only what initially lead Hosseini to begin to write "The Kite Runner", but the kite's themselves represent Amir at the end. Amir is finally free of his guilt much like a kite is finally free after it has been cut by it's opponent.
Gypsy: “Dance is active meditation. When we dance, we go beyond thought, beyond mind and beyond our own individuality to become one in the divine ecstasy of the union with the cosmic spirit. This is the essence of the trance dance experience.