Abstract: A three-dimensional puzzle assembly comprising a structural portion and a decorative portion is described herein. The structural portion includes a plurality of structural elements that may be assembled to form a predetermined three-dimensional shape. The structural elements include first connectors. The decorative portion includes a plurality of decorative elements made of resilient material and provided with a front decorative surface and a reverse surface. The reverse surfaces are provided with at least one second connector configured, positioned and sized to connect with the first connector to therefore removably interconnect the decorative elements and the structural elements. A wall mounting assembly to support a three-dimensional puzzle assembly is also described herein.

Abstract: The need to utilize alternative power sources for generating electricity is answered by harnessing the power of the tides in oceans. A power unit consists of a float with an opening therethrough which permits the float to ascend and descend a fixed column mounted on the ocean floor, the float being responsive to the variation in tidal height. Force linking means connecting the column and float transmit the linear power to a suitable form for an electrical generating means mounted on the float. The types of force linking means include a gear rack and gear means; helical gear combination means, gear speed-multiplying means and piston means.