My son just made his first quilt and he used Ravenclaw colors (blue & silver) in a 4-patch design. He's ten, so that was as complex as he was going to get. We bought some Harry Potter fat quarters from spoonflower for some of the blues. I bought kona solids for the gray/silver. It turned out cute. Ravenclaw is also my house, and I want to make my own some day with more complex blocks and with the book colors (blue and bronze).