For something pocket-sized and therefore realistic for a young person to actually keep handy: look into the Storm Shelter marketed by the Tacoma Mountain Rescue Unit through REI.com and other places. Doug's review of shelter options mentions it as a good option for it's size. It's also cheap at about $4. <br><br>You can just pull it on like a sleeping bag or you can set it up like a tube-tent or slice it open for a tarp.