This article describes a hands-on educational activity designed to introduce students (or industrial employees) in the pharmaceutical arena to some of the most common problems in the mixing of solids: Active Pharmaceutical Ingredient (API) and lubricant (i.e. magnesium stearate) homogenization, characterization of segregation tendencies, and measurement of flowability (ability to flow) and density of blends. The students learn how to assess several properties of a formulation, how blender operating conditions affects them, and how they correlate with each other. (Contains 4 tables and 4 figures.)