BEST ROCK TUMBLER FOR KIDS Our advanced design means rock tumbling doesnt take weeks anymore. Now you can turn rough stones into beautifully polished gemstones. Simply open the container, add your rocks, and press a button. The high quality rock tumbler does the rest. Great gift idea or use as a classroom teachers project. COMPLETE GEOLOGY SCIENCE KIT INCLUDES-High-quality state of the art rock tumbler with built in timers and sound cover, Leak proof tumbler barrel with our exclusive polishing liner-Over pound of beautiful collector stones, 3 bags of rough stones including amethyst, jasper, and agates, 2 ring fasteners. Polish your gemstones and glue them on a ring for fashion jewelry. Simple instructions Nature Bound Toys is brought too you by Thin Air Brands, as USA based company. Green, 3 lbs Item #NB527