Because there's so much crossover between the worlds of eating and crafting around these parts, here's a food find that isn't actually edible: Botanical paints made out of fruits, vegetables, and herbs. Naturally, this simple-yet-genius product was invented in Berkeley. Glob Natural Paints utilizes ingredients like pomegranate, tangerine, blueberry, and basil for a concentrated powder paint that smells like its namesake. (You're not supposed to taste them but we got a lick of the tangerine and, while not something we'd eat again, it tasted rather natural.)
Mix them with a little bit of water and they function like watercolors, or you can dump extra powder in and get a more substantial brushstroke. Individual paint pouches (packaged like seed packets) and gift sets of Glob are available in San Francisco at Buyer's Best Friend in the Upper Haight.