Putting the cap back on markers is just so hard to do, isn't it? It seems like it, anyway, judging by the number of rock-hard markers lurking in kids' art supplies (and, um, in my pencil cup at work, which holds a number of dried-out fine-tip Sharpies). Thanks to one clever art teacher, you can still salvage them. Dunking them in a tub of water results in very vibrant, homemade watercolors. For the exact how-to, check out Artopotamus.
Link via Ohdeedoh