This set comes with everything you need to get started polishing and tumbling rocks, including the rocks/stones themselves! Includes rock tumbler with power cord (retails $49), directions, two sets of grit solutions for each of the four steps, Rocks & Minerals book ($10), various stones to polish, and a toothbrush for cleaning. It’s a super fun set that any kid would love! The large National Geographic bottles shown in the last photos show the least and most filled grit bottles. (Retails $25).