11/27   Can somebody id this puzzle game?  It's like a typical jigsaw puzzle
        except that all the pieces are squares and made of plastic.  You
        put the plastic pieces into a tablet.  If the puzzle has 16 pieces
        total then one blank piece is removed.  You have to complete the
        picture by moving the squares up, down, left, and right.  Since only
        one piece is removed, you can only move one piece at a time. It's for
        kids and varies in complexity.  I'm trying to get it for my niece.
        \_ Slide puzzle
        \_ http://www.slidingpuzzle.com !
        \_ it is also known as the "15 puzzle".