Plantarium Single Vial Garden Lab

As stocking stuffers go, there's few cooler than the Plantarium Single Vial Garden Lab ($10). This slender test tube features a nutritive and non-toxic gel created in collaboration with NASA scientists that allows you to watch your plant grow, both above and below the surface. Available in six different varieties, the Labs make a great gift, or a nice, natural addition to your cubicle decor.