The Thames & Kosmos Rock Tumbler sale (Spoiler: It’s a lot

(Spoiler: It’s a lot

and mechanical transmissions

(3) AAA batteries required but not included

because magic isn’t free)

The Thames & Kosmos Rock Tumbler sale (Spoiler: It’s a lotGot a kid whos into science, shiny things, or just enjoys loud, vibrating machines that turn regular rocks into geological divas? Well buckle up, because the Rock Tumbler is here to polish those pebbles into high gloss, Instagram worthy gems that scream, I learned something AND made jewelry. This isnt your grandmas clunky tumbler (unless your grandma was cool and had USB C power supplies). This sleek little science beast has a built in timer that can