The problem with light is that so much of it is invisible. What most see as, oh, plain old boring sunlight actually contains a ROYGBIV spectrum of colors. (Or were you sleeping through that demonstration in science class?) But without special lenses, prisms, or superhero powers, how to unleash all those pretty colors? With a Rainbow Maker, of course. Just stick the little contraption on a sunny window, and wait for solar power to do its magic, which in this case sets a crystal whirring. When sunlight hits the crystal, it gets refracted into a multitude of rainbows. Try getting a mobile, with its unvarying round-and-round, to do that. Bingo. Nature’s best kaleidoscope, right there on the wall. Available online at chiasso.com.