Smithsonian Rock Tumbler mothers_day store the blocks in the

store the blocks in the reusable bag for easy cleanup

and building safely

Whether kids are learning the basics or improving their throwing skills

This hands-on kit includes everything needed to excavate six real gemstones

With 28 standard-sized double-six dominoes featuring different colored dots stored in a tin case

Smithsonian Rock Tumbler mothers_day store the blocks in theTurn ordinary stones into sparkling gemstones with the Smithsonian Rock Tumbler! This real working tumbler smooths and polishes rough rocks using abrasive grits and waterrevealing stunning natural colors and shine. A hands on STEM geology kit perfect for aspiring rock collectors and jewelry makers ages 8+.