How do I make a DIY unicorn horn?

You can roll sparkly felt or glitter cardstock into a cone, glue it shut, wrap it with metallic embroidery floss for the spiral effect, and glue it to a headband.

What should a child wear under a tutu?

Opaque leggings, tights, or bike shorts are best to prevent itching from the tulle and to provide full coverage.

Are there warm options for a unicorn costume?

Yes, a full-body fleece unicorn onesie with a built-in hood and horn is an excellent, warm alternative for cold weather.

Skip the store: Roll a piece of sparkly felt into a cone shape, stuff it with cotton balls, and hot glue it to a plain plastic headband. Use a plain white long-sleeve t-shirt from the closet. Tie strips of pink, purple, blue, and yellow tulle onto an elastic waistband.

AI-generated example

Kids Unicorn Costumes

Bring rainbow magic to life with a sparkly, comfortable unicorn look.

Kids unicorn costumes are a perennial favorite for Halloween and dress-up play because of their bright colors and magical appeal. This guide covers how to assemble a classic, comfortable unicorn look using a pastel base, a fluffy rainbow tutu, and a signature horn headband. It is a highly customizable style that can range from a cozy fleece onesie to a sparkling princess-style dress.

Difficulty: Easy
Time: ~20 min
Budget: $15–45

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Kids Unicorn Costumes costume — Example look · AI-generated

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40 Kids Unicorn costume ideas

Ranked by how many people are searching for them this season. Open any one for the full guide and to try it on.

What you need for a Kids Unicorn Costumes costume

Unicorn horn headband
A soft, fabric-wrapped headband featuring a metallic or glittery spiral horn and soft ears.
DIY: Roll a piece of sparkly felt into a cone shape, stuff it with cotton balls, and hot glue it to a plain plastic headband.
Amazon
White or pastel leotard or t-shirt
A solid white, light pink, or lavender long-sleeve top to serve as the comfortable base layer.
DIY: Use a plain white long-sleeve t-shirt from the closet.
Amazon
Rainbow tulle tutu skirt
A multi-layered, elastic-waist skirt featuring vibrant pastel or neon rainbow colors.
DIY: Tie strips of pink, purple, blue, and yellow tulle onto an elastic waistband.
Amazon
White leggings or tights
Opaque white or light pink leggings to keep legs warm and comfortable.
DIY: Use any solid-colored pastel leggings already owned.
Amazon
Yarn unicorn tail
A clip-on tail made of multi-colored yarn that matches the tutu.
DIY: Tie a bundle of colorful yarn strands together and attach it to the back of the tutu waistband with a safety pin.
Amazon

How to put it together

1
Put on the solid white or pastel long-sleeve top and matching leggings.
2
Pull the rainbow tulle tutu skirt over the leggings, ensuring the elastic sits comfortably at the waist.
3
Attach the yarn unicorn tail to the back of the tutu waistband using a secure safety pin or clip.
4
Place the unicorn horn headband securely on the head, positioning it just behind the hairline.
5
Finish the outfit with clean white sneakers or sparkly ballet flats for comfortable walking.

Makeup & hair

Style hair into a high ponytail or two side buns, weaving in temporary hair chalk or clip-on rainbow hair extensions. Keep makeup simple with a touch of skin-safe face glitter on the cheekbones.