How To Make a Polystyrene Unicorn Decoration

How To Make a Unicorn Decoration

Learn how to make a simple polystyrene unicorn decoration for kids birthday parties and other events.

Learn how to make a polystyrene unicorn decoration for birthday parties. It’s not too hard, but not too easy either. The hard part, it’s cutting the polystyrene. In the last article, I was talking about the hot wire cutting machine. I wanted to present that first, as I will use it in many of the tutorials. If you want you can read the article and build one. If you don’t have the skills to build one, here you can buy one.

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  • Printer and A4 paper size
  • One polystyrene piece
  • Black marker
  • Brushes
  • Acrylic paint
  • A pin needle
  • Mixed white glue 50% and water 50%
  • White sparkling glitter
  • Hot wire polystyrene cutting machine or a cutter

Printing The Unicorn

You will need a printer with A4 size paper or similar. I downloaded the image from Then I used Poster It to create the poster of the image.

Tracing The Image

To trace the image on the polystyrene, you first tape all the printed papers together. Place the poster on the polystyrene, and with a pin needle you start tracing. Double check once you finished, and make sure you got it right. For the next step, simply draw with a black marker over the traced lines.

Hot Wire Polystyrene Cutting Machine

Cutting The Unicorn Shape

If you have a hot wire foam cutter, just follow the video. If you don’t have one, try using a sharp cutter. It will be a little difficult though. Or simply buy the one I would recommend, as it will be useful in many crafts projects.

Painting and Finishing The Unicorn Decoration

From here on everything it’s easy. Paint the shape in the desired colors. Here you an be creative and pick some happy colors, kids love them. Follow the video tutorial and everything will turn out perfect. Let the paint dry well before applying the next layer. For the final black contour, you can also use a black paint marker. The paint I always love to use and I’m happy about it’s the patio paint from DecoArt.

The paint marker usually melts the polystyrene. Used on top of the paint, never created any issues though. It’s a lot easier and faster with this one. At the end paint everything really quick with the mix of 50% white glue and 50% water. Now sprinkle white glitter all over it. Let it dry well, and your decorative unicorn it’s ready.

Painting a Polystyrene Unicorn Decoration
Party Decorations - How to Make a Unicorn

Video Tutorial

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