Unicorns are mythical creatures known for the single horn on their head as well as their shimmering mane and tail. Stories featuring the creatures often speak of the healing properties in the horn and the unicorn's ability to run silently through the forest. Children who are fond of fairy tales, rainbows and imaginary figures are often drawn to unicorns. Make a unicorn costume for make believe or as a Halloween costume from common craft supplies and clothing.
Cut a half-circle from a piece of white poster board. Roll it into a cone shape. Tape it so that it stays in place. This will be the base of your horn.
Glue a piece of gold braid around the bottom of the cone. Spiral a piece of yarn from the top of the horn down to the bottom. Glue it in place. Look for yarn that has metallic strands or glitter running through it.
Sew a piece of thin elastic from one side of the bottom of the cone to the other. The elastic should be slightly smaller than the diameter of the base of the cone. The horn is positioned on the top front of the head, so that it angles forward. The elastic will run around the back of the head under the hairline.
Put on a pair of white sweatpants and a long sleeved white T-shirt for the costume base. A pair of white tights, leotard and a pastel-coloured tutu will also work.
Braid thick yarn and ribbons into a tail approximately 60 cm (2 feet) long. Add a bow to the top of the tail. Attach the tail to the sweatpants or leotard with a few stitches or a safety pin.
Cut four oval shapes from the fake fur. Add a piece of elastic that stretches from one side to the other. Place the fake fur over both hands and shoes.
Spray glitter hairspray on the child's hair. Alternatively, a wig can be worn. Choose a long blond, white or pastel coloured wig to mimic the look of a mane. Apply glitter make-up to the cheeks to finish the costume.