Rock Tumbler Refill Kit Garden Watch as the swinging balls

Watch as the swinging balls transfer energy and momentum

Includes illustrated instructions to guide building

absolute-zero far reaches of space

This engaging 3D bird puzzle offers a hands-on way to explore wildlife while building a detailed wren model

chic look that blends seamlessly with any decor

Rock Tumbler Refill Kit Garden Watch as the swinging ballsThe Rock Tumbler Refill Kit provides everything you need to keep polishing stones and exploring the science of geology. Designed for use with most standard rock tumblers, it includes a fresh assortment of rough stones along with the grits needed to smooth and shine them. Its a great way to extend hands on learning for students, hobbyists, and rock collectors. Why youll love this: Includes rough stones ready for multi stage tumbling Comes with