Click ahead to find out exactly how Lena pulled it off so you can follow along or get inspired to submit your own DIY kid’s costume in the 2011 Inhabitots Green Halloween Costume Contest.

Print out Gary's unicorn horn template (click to open in ... Cut both ears out. 4. Make thick diagonal stripes across your horn with the washi tape in the following order: red, orange, yellow ...

And in a world where social media conspires to make us all look the same, every iteration of a unicorn costume can be brilliantly ... Here, she breaks down how to DIY it, exclusively for Elite ...