Eighteen on a Hand (Paradiddle-diddle Builder) is a twist on the traditional 8 on a Hand. By adding a huckadig (one-handed breakdown of a paradiddle-diddle) to the measure of legatos, this exercise opens the door to many great variations for combining and refining doublestroke and accent-tap fundamentals, in service of building excellent paradiddle-diddles. It is a simple concept, but there is a lot that you can do with it.