Kill a spider, and you get spider silk, handy for making bows and arrows. In its first year, Minecraft found popularity mostly among adult nerds. But sometime in late 2011, according to Alex Leavitt, a Ph.D. candidate at the University of Southern California, children discovered it, and sales of the game exploded. Read Article Binary Numbers This project teaches you about binary numbers and how to translate them to decimal numbers we recognize. Where the basic Raspberry Pi operating system looks like any computer operating system, the Kano uses a colorful and highly polished set of screens, buttons, and other elements to make the computer look friendly for kids.