I think this is a fantastic idea. I can do some plain knit blankets. My younger sister will be back home for the holidays so I can get her to make a couple too. If that helps, let me know, and I'll get started ASAP.
Roxycat - I still have to knit my own Slytherin scarf, I'm finishing a Gryffindor one for a friend. Just need to weave in some ends and add the fringe. I think I'm going to make the 6 repeating aliens now, after you explanation. The more the creepier. Haha... Hopefully I'll be able to get my hands on the skull illusion chart. I'll just do one skull for that scarf.