This is an interesting and unusual puzzle designed by Erich Friedman and made exclusively by Creative Crafthouse. There are 3 pieces of a light colored wood, and 3 pieces of a dark colored wood. The object is to cover the light colored onces with the dark colored ones such that they fit exactly. Its hard! Yet easy to attempt and very compelling. There are variations for different difficulty levels: Easy: cover 2 of the light pieces with 2 of the dark pieces. Medium: cover 2 dark and 1 light with 2 light and 1 dark.