I'm not sure why the review process asked me to rate the "light weight" -- they are rocks. they are not light weight. it was not a feature i was seeking.ANYWAY these are great. I've ordered them twice. They are natural material, uncoated, and therefore appropriate for many uses, particularly for use around living things that might be susceptible to toxins in coatings, paints, etc. (plants, animals, children).I use these in my box turtle habitat-- carefully arranged, these give him places to climb, rest, hide. I find them helpful in creating a border around his little soaking tub-- b/c he has to climb over some rocks to get between his substrate and his soaking tub, he doesn't track as much soil and substrate into his bath and the water stays cleaner longer.but i can see how these would also be great in bulb forcing dishes, plant beds to keep weeds down, and in water features of gardens. I think they'd be great as landing spots in water sources for bees and small lizards. they'd also be great in classroom use as name tags for students. They're also kind of not bad as essential oil diffusers-- a couple of drops on the stone surface of a flatter one, and boom. you have a diffuser. warm it up under an incandescent lamp to really let the scent dissipate.rocks were the first tools, y'all. you can do a lot with them. have fun.