Cut out the shape. I did trace this unicorn. I just found an image on google images, copied it to word, sized it up pretty big, and then put my paper right onto my computer screen.
Position your images and iron them onto the shirt.
Paint right over the shape. Be slightly careful at the edges that you paint in, not out to the edges. I mixed some colors together to get the paint color I used. When it was mostly dry, I painted over both with clear glitter paint. An older child could do this part.