I've played with crayons, oil paint (icky), pastels, house paint, colorful rocks (powdered and smeared in my sketchbook), sand, mud... my favorite is water. Watercolor sounds like Grandma painting posies, but it's far more. It can be quiet and serene, or noisy and splashy. It's one of the oldest color media. One of the simplest; you can carry a small kit riding, birdwatching, backpacking, kayaking, or roaring on a reach on a pirate ship (just don't drop your palette on the pale, absorbent deck, or you'll be swabbing it). Watercolor can also challenge even the most experienced artist. Here are a few examples of mine. Click on the pic for larger image.