Knot Dice Squared is an expansion to Knot Dice, with 26 more dice of 3 different types. New rules are included for many of the original games, and a puzzle book provides new puzzles incorporating the new dice. It also add tokens to accommodate 2 more players in some of the games. You still create Celtic knot designs with these beautiful dice, but the new patterns make for slightly more difficult games and a much wider variety of designs.