Are you a fan of Big Bang Theory or just a science lover like myself? I liked the look of this atom logo on a green hoodie I saw for sale online but had to see it in a crochet hat of course. This was an easy crochet project but time consuming to stitch everything in place but I just had to give it a try. Now I have my own BBT hat to wear. :) A perfect gift to make for yourself or the cool geek in your life. Happy crafting!