Players stack pyramids, not allowing them to touch more pieces than the number of pips on the piece. * Each player must place a piece of a different size than the previous placement. (The first piece placed on the Foundation is not affected by this rule.) * The point of one piece cannot touch the inside point of another piece * A piece can be placed on top of another piece as long as it does not violate these rules * Pieces must be placed with one hand * A player cannot touch any pieces other than one the being placed (unless reassembling after a break) More information can be found on the Icehouse Wiki or on the designer's site. Game System Icehouse Pieces