Mostly, I couldn't think how to illustrate quarks

In the wake of putting away the Christmas decorations, the house can seem kind of empty and cold. The only solution, to my mind, is to make new decorations to brighten things up for the rest of the winter. To start that process, I made a little embroidered image for my bedroom door. I've been fascinated by science images lately, so decided to make an atom with a scrap of knit fabric and multi-colored thread.