Patent US 5,407,201

A puzzle is disclosed which consists of a three-dimensional geometric structure made up of a plurality of smaller three-dimensional structures, or pieces, that feature a plurality of indicia overlapping their edges. When correctly assembled, completed indicia appear on all surfaces, both exposed and non-exposed, as the portion of the indicium on each piece's surface matches the complementary portion of that indicium at the adjoining piece surface at the intersecting edge of the adjacent pieces. Construction consists of selecting a desired puzzle shape, selecting a set of smaller sub-division pieces which when assembled form the desired final shape, identifying the edges of the pieces which are adjacent to one another in the completed puzzle, selecting a desired set of indicia and overlapping the indicia over the edges such that completed indicia are observed on all adjoining faces.