This whimsical set of chicken-shaped tiles has two forms, transmogrified from the classic "kites" and "darts" found by Sir Roger Penrose to be the fewest number of different shapes to tile the plane nonperiodically. Roger held the world record for fewest shapes for many years, until 2023, when a team of four mathematicians, headed by David Smith, found a single shape, the OneSTone, also called "Spectre". Here is the shape of the "one stone":

These "Perplexing Poultry" sets are trickier than the simple, straight pieces. We sold them for many years, until the supply ran out. The standard kites and darts still exist, and we will continue to make them. Only the poultry has been retired, and once these last few sets are sold, there will be no more. These last sets, of 65 pieces each, are offered in a handsome wooden tray to allow lots of experiments and decorative patterns. You can even display your set as a work of art. $85