Cut a banana in half lengthwise. Place one half, cut side up, on a plate. Use a whole graham-cracker rectangle for the wings and a quarter rectangle for the horizontal part of the tail. Spread peanut butter on the rest of the banana, and top it with the other banana half. Cut a slit at the tail end of the top half, and push a graham-cracker rudder piece in place. Apply raisin windows in place with more peanut butter.