rosiebird told me about this in a comment to another post, so I thought I'd share it with other Potterverse fans in its own post. I've done needlepointed plastic canvas projects in the past and this looks pretty quick and easy.
Hogwarts house crest tissue box pattern
The pattern can also be used to make coasters and magnets as well as tissue box covers. If I do this, I'll most likely have it be a Slytherin-only box -- or maybe Slytherin and Hufflepuff, since I'm a Slytherpuff. Have to find a place that sells plastic canvas first though . . .