Distributions are the basis for an enormous amount of theoretical and applied work in statistics. While there are formal definitions of distributions and many formulas to characterize them, it is important that students at first get a clear introduction to this basic concept. For many of them, neither words nor formulas can match the power of a demonstration to imprint a vivid memory and encourage an intuitive understanding. This article describes a demonstration involving the probability of outcomes observed with "loaded" or "weighted" dice. This demonstration may be used to help develop students' understanding of the concept of a distribution, and to provide a foundation for the intuitive link between distributions and hypothesis testing. (Contains 1 table.)