A rainbow is no everyday miracle, you can't wish one into being; only the sun can do that. So imagine the cozy warmth of seeing one show up in a flicker, seemingly out of nowhere, to highlight a phrase on the page you've been reading, or paint the face of your sleeping baby, or tantalize your grooming cat. The optical element of this charming little device is precision-cut crystal, so the colors are pure and true. The mechanism is solar, waking up when enough sun shines on it and quieting when it doesn't. A great gift for new homeowners, new parents, or anyone who might benefit from some random flashes of delight.