Abstract: An assembly is provided having at least two sets of pieces representing characters of a known set. The pieces may be connected to form an assembled puzzle of the pieces wherein the completed assembled puzzle arranges the puzzle pieces in a known order for a known set. Preferably, the pieces are letters of an alphabet wherein one portion of the puzzle pieces are lower case letters of the alphabet and another set of the puzzle pieces are upper case letters, of the alphabet. The lower case letters fit into the upper case letters to complete the upper case letters, and the upper case letters fit into another conventional puzzle piece which, following assembly of the conventional pieces, place the known set of characters in the known order.

Abstract: A stackable puzzle and assembly having a set of known characters arrangeable in a know order are provided. The puzzle includes pieces that may be interconnected to form a stack of the pieces. The stack can only be arranged in the known order as a result of a unique arrangement of pegs and apertures on each of the interior pieces of the stack. The first piece preferably includes only pegs and the last piece only includes apertures. A method is further provided for stacking a plurality of characters representing a set of characters such that the set is arrangeable in a known order.