Who doesn't believe in fairies? With this costume, a beautiful fairy will magically appear on your doorstep.
If I had wings, I could also be a ... beautiful butterfly, flying pig, lucky ladybug, Pegasus, black bat, or Tinkerbell.

Begin by creating the wire wings. Start with a coiled roll of 9-gauge aluminum wire (available at hardware stores). Cut a 13-foot length and bend it in half. Twist a small loop at the bend (use pliers, if necessary).

About 8 inches up from the loop, form a large wing shape with 52 inches of wire. Repeat on the other side. Close the wings with a twist as shown. (Note: the wing can be bent into different shapes).

Form a triangle, about 5 by 8 by 8 inches, above the loop from step 1. Twist and trim the ends so they do not protrude from the triangle; duct-tape them, if necessary.

Cut the legs off a pair of queen-size panty hose. Stretch one leg over one wing, secure with a pipe cleaner, and stretch the excess over the triangle. Repeat on the other side.

Tie the middle of a 7-foot piece of ribbon to the bottom of the triangle. Thread the ribbon around the triangle so the wings can be worn like a backpack.
Next, have your fairy put on her pink outfit. Fashion a simple crown for her hair out of a starry garland. Add some star stickers and/or body glitter to her arms and cheeks. Hand her a vial of fairy dust (glitter), tied into a necklace with string.
Finally, help her put on the Wire Wings.