So I saw a headband like this on Etsy and was like well I can make something similar for way less the $23 so I did. My sister described it as "gross cute" because of the brain drips. Well I said of course they're cute, they are sparkly brain drips! This would be good for a zombie costume for Halloween or a zombie walk.
Sorry I don't have pictures of the process =/
You want to cut out a general brain blob shape with the black felt, add little drippy parts to. this is like the hard backing, support for the clip.
With the red felt cut out a shape similar but smaller than the black shape minus the drips and glue this down.
Do the same with your pink felt but make this one a little more bumpy like not so perfect looking but like your missing a chunk o' scalp and then glue this down
Take your black paint and make the squiggly brain designs of your brain. There is no pattern just don't make it too crowded.
Take your red paint (mine just happened to be glittery) and paint your brain drips, like your head is leaking blood and goo, I painted the exposed red felt to give it like a shine and so it matched the glitter drips.
Once dry take a large bobby pin and glue just the end down to the back of the clip. Take a small piece of felt and make a little patch to anchor your clip down. then you are done!