Abstract: A puzzle assembly having a plurality of pieces which are identical and which interfit without interlocking are assembled in a recess of the base of a container and the container is closed by a cover hinged to the base. When the cover is closed, the puzzle pieces are disposed between top and bottom walls formed respectively on the cover and the base. The pieces are made of a resiliently yieldable material and their normal thickness is greater than the spacing between the walls when the cover is closed so that the pieces are clamped between the walls and are held against sliding even though only some of the pieces have been assembled. The puzzle has a design on both sides and the top and bottom walls are transparent so that both designs may be viewed with the cover closed.