Musical webtoy where you just click to create. Click anywhere within the black play area to create an orange circle that will expand until it touches another. When the two collide, they emit a tone and then shrink back down before expanding again. You can create as many circles as you want, including circles within circles, and the result is a simple but calming melody that sounds a bit like rain and a bit like a sedate toddler on a xylophone. Hit the [spacebar] to clear the screen.
As Always, Good Luck and Have Fun.