National Geographic Rock Tumbler Science Set for Child or Teen Ages 8 Years and up

Create your own gemstones with the National Geographic Hobby Rock Tumbler Kit. Includes one pound of rough gemstones and eight packets of polishing grit. Features a durable motor and a leak-proof, low-noise tumbler barrel. Built-in timer and automatic shut-off switch for easy use. Comes with five jewelry fastenings and a storage pouch. Educational guide included to learn about rock polishing and gemstones.