Gave as a gift to a little boy who loves the study of rocks. Excellent learning tool! He loves it!

We bought this for our child for Christmas. It is fun to use and interesting to see how the rocks change over time as they go through the tumbling process. Be aware though, even though this product is well-made and probably quieter than other models, it is not a quiet machine. It also needs to run over a period of weeks, so we placed the tumbler in the garage. A great gift for a budding geologist!