If you go to the Picture Gallery there are lots of pictures of OBWs. OBW stands for One Block Wonders and is a way of cutting 6 repeat triangles from stacked fabric. When the 6 pieces are put together they create a kaleidoscope effect. The fabric chosen can be rather homely but the results truly beautiful. OBW is one method but there are others in the same family of fabric repeats. They are Stack & Whack, 4 Patch Posie (4PP), fans, rectangles....