Abstract: A puzzle having at least two overlapping circles disposed in a base, each circle being defined by a number of petals and a number of triangles. Each of the petals is formed of two arcs which are portions of a circle of the same circumference as each of the overlapping circles, and the triangles have faces in the form of arcs complementary to the arcs of the petals. The overlapping circles have common component petals and triangles, and rotation of either of the circles causes displacement of the common components. The petals and triangles have complementary tongues and grooves. The portion of the base underneath the circles has upwardly directed partial annular ridges, and the petals and triangles are provided with downwardly directed extensions which engage and are guided by the sides of the ridges.