Cairns are man-made stacks of stones. They can be built for purposes of navigation, landmarks, monuments, ceremony, or maybe you just felt like putting some rocks on top of each other. Well, what you’re looking at here is a digital stack-o-stone. You can use this binary heap of rubble to mark where your buried treasure is, pay tribute to your favorite constellation, or help remember someone, all without going outside and tainting your frail hands with filthy gravel. I can’t make any promises about whether a deity will award any favor for purchasing one of these here cairns, but I’ll certainly appreciate the gesture. I’ll even put in a good word for ya.