I use Artist’s Loft Soft Pastels. They sell them at Michaels for $3.99! The trick is you have to use heat to make the color stay longer than just a few hours. I’ve found that a curling iron works best.
Just started making these and of course I had to make the first one in Sigma Kappa colors! I’m going to get an Etsy and sell them, along with sorority embroidered headbands, as soon as I get out of school. More news on my future Etsy to come :)