Camping often means getting comfortable with bugs, sleeping bags, temperamental weather and other joys of the outdoors. But besides building a nice fire to keep warm, or using a DIY rocket stove, sometimes it's nice to bring some heat into a chilly tent. This portable wood stove design -- which can conveniently fold down to a compact, easy-to-carry package -- might just do the trick to heat up the interior of a tent, tiny house, yurt or van.