The PSF would love your input on sticker designs. We have a new hex-shape sticker [attach pic] and would love to get 5 more designs so that people can collect all 6.
http://blog.royalmint.com/collect-the-shield/Since the coins are round they don't fit together particularly well. So the coin designer went with that and spaced them out a little. We don't have that problem--the hexagonal stickers will fit together superbly. So the hexagonal stickers should each have something interesting in their own right, but also show part of a larger structure that's revealed when you get all seven and arrange them properly.