USB flash drives have become ubiquitous in offices and at home as a convenient way to carry lots of data on a small device. For many people, flash drives have become a common staple in the junk drawer. Next time you're organizing, instead of throwing them away, recycle them. RecycleUSB (recycleusb.com) has partnered with Sugar Labs to collect used flash drives and reprogram them into free portable and interactive learning environments called Sugar on a Stick. The goal: Create a fully functioning mobile classroom on an easy-to-carry thumb drive. All you have to do is send the organization your old flash drives -- RecycleUSB will do the rest.