Abstract: A game having page pieces and a game surface including game piece receiving members. Each of the first set of game pieces also includes a solution position and non-solution positions in which the game surface-engaging member is mated with one of the plurality of game piece receiving members. When a game piece is in a solution position it exhibits an indication, such as sitting lower with respect to the game surface or illuminating a light, which visually distinguishes the game piece from at least some of the game pieces which are in the non-solution position. Aside from the visual indication, each game piece is visually indistinguishable from all other game pieces for each game player when the game pieces are located on the game surface in an upright position.

Abstract: A puzzle having a plurality of elements, each having a plurality of faces. When assembled, the faces form a plurality of puzzle sides that, when the elements are properly arranged and oriented, display a puzzle “solution” (e.g., each of the sides showing faces all having the same color). Each puzzle may have one or more solutions. The puzzle is preferably laid out so that it can be solved using mathematical and/or logical analysis and without the necessity of trial and error.

Abstract: A game device having a set of blocks and a tray. The blocks include pyramid-shaped recesses and the tray includes a complimentary set of pyramid-shaped protrusions that the blocks rest on. The blocks also include cylindrically-shaped guide recesses and the try includes complimentarily-shaped cylindrical guide protrusions. When a block is moved from one protrusion to another, a guide recess engages and pivots about a guide protrusion, which forces the puzzle to tip when being moved.