Smithsonian Rock Tumbler Rocks & Fossils Find the animals that interest

Find the animals that interest you and uncover new favorites along the way

or displayed as art

perfect for science enthusiasts and educators

only the largest of mosasaurs would have been a match for this vicious mega-predator of the Western Interior Seaway

Smithsonian Rock Tumbler Rocks & Fossils Find the animals that interestTurn rough rocks into beautiful, polished stones that you can use to make charms, bracelets, keychains, and more. Begin by tumbling the included rocks in a barrel with water and grit, then repeat this cycle using progressively finer grits. In just weeks, the Smithsonian Rock Tumbler mimics the process that takes oceans thousands of years! Turn rough rocks into beautiful, polished stones! Includes accessories to make charms, bracelets, and keychains.