The Discovery MINDBLOWN Rock Tumbler Set offers a fun and engaging way for your child to learn about geology and rock formation. Just add water and gritty sand to the tumbler to see how rocks and gemstones are naturally shaped and smoothed.
Suitable for ages 8 years and up
1 rock tumbler base
1 tumbling barrel
1 bag of rocks
1 metal ring
This tumbler allows you to smooth rocks and gems by exposing them to running water and gritty sand