Each domino square is a double domino. Instead of two parts, each has four. Play can play all of the standard domino games like Block, Draw and Mexican Train, or play the exclusive new "Domino Squares" game. Includes 45 Domino Square dominoes (equivalent to 90 regular dominoes), scorepad and rules. From the publisher's website: Winning Moves Games takes dominoes to a new dimension with Domino Squares. They’re twice the size of regular dominoes for double the fun–and players score on every turn (score sheets provided). Enjoy playing Domino Squares! The pieces found in Domino Squares have four advantages over common dominoes: 1. Each is a "double domino" – a large square comprised of four smaller squares (like two rectangular dominoes joined together). 2. Some pieces cause actions to occur. These are called "Command" pieces and contain words or phrases like "Skip" and "Draw 1". 3. Pieces can be played with more variety. You may play a piece that matches any of the three open-sides of either "end" piece on the layout. 4. Scoring occurs on every turn. After it is played, points are awarded for the "scoring side" of a piece (its two unmatched squares.)