Using colorful M&M candies, an imaginary set of World Book Encyclopedias, and some free online tools, you will learn exactly what is meant by confusing genetic DNA genealogy terms like mutations, segments, crossovers, cM ("centimorgans"), DNA matching, ICW ("in-common-with") matching, triangulated matching, match clustering, chromosome browsers, SNP ("single nucleotide polymorphisms"), STR ("short tandem repeats"), and more.