Blue Marble is a STEM toy company from Ashland, Oregon, formerly known as JMW Sales, founded by Jordan Willing and now led by CEO Jared Wolfson. It is one of the largest National Geographic licensees, also works with NASA and runs its own factory in Xiamen, China. Its own brands include Discover with Dr. Cool, Blockaroo magnetic foam builders and Tie-Dye Dotz, and its products reach more than 60 countries. Circana named the company's National Geographic Rock Tumbler Starter Kit the top selling science toy in the United States.
For families, this is the easiest entry into the hobby: the tumblers ship with rough stones, grit stages, jewelry findings, an automatic shutoff timer and a leak resistant barrel with a stainless lid. Serious rockhounds outgrow them quickly, since capacities are small and the plastic housings are not built for months of continuous work.
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