Stencils certainly have a huge place in my heart. To my delight, this stencil, or rather font, is called PDU and allows you to create all letters, numbers and symbols from one universal grid. Designed by Dries Wiewauters of Colophon Type Studio..... it certainly could create endless hours of playing.
Above: Newspaper from Colophon explaining the history and rational behind the PDU font. Based on the original idea (Joseph A David in 1876) of a stencil system that could be used universally by sign makers - .