You can buy some here [0]. Really nifty laser-cut acrylic pieces in a variety of colors, and you can even get a vinyl mat and set of rules for a board game that

You can buy some here [0]. Really nifty laser-cut acrylic pieces in a variety of colors, and you can even get a vinyl mat and set of rules for a board game that uses them. (Disclaimer: I personally know the designer of the game, and helped her playtest it.) [0] http://gamepuzzles.com/pentuniv.htm#KD http://gamepuzzles.com/pentuniv.htm#KD