First, make your airplane. Oooo, nice one. Then, you just slip your Electric Paper Airplane Conversion Kit propeller-stalk thing onto your paper airplane. It clips to the front, with the prop sticking out the back. Hold the battery pack up to the front and enjoy the sound of the propeller motor winding up. After 20 seconds (and don’t do more, or you’ll blow out the capacitor), you’re fully charged and ready for about a minute and a half of awesome, propeller-driven flight time.