CODECOMBAT OPENS UP: Here's one way to get kids to code: Make the source code for a slick game open source. CodeCombat, a Y-Combinator-funded startup, has decided to let it all hang out. From the company's blog: 'Whether you’re a novice programmer wanting to figure out this GitHub thing or an open source guru looking for something to sink your teeth into, check out our GitHub and join over two hundred CodeCombat Archmages in building the best programming game ever." More than 180K kids played CodeCombat (and defeated the 44 ogres in the beginner campaign) during the "Hour of Code." That's totally a way to play big.