1. A multi-dimensional puzzle, comprising: a first jigsaw puzzle formed from a first set of inter-fitting puzzle pieces, said first jigsaw puzzle having a first size and a first shape; a second jigsaw puzzle formed from a second set of inter-fitting puzzle pieces, said second jigsaw puzzle having a second size, which is smaller than said first size, and a second shape, which is different than said first shape; and mounting means for mounting said second jigsaw puzzle in a spaced relationship above a portion of said first jigsaw puzzle, said portion of said first jigsaw puzzle corresponding to a predetermined scene depicted therein, said scene having a third size, which is substantially the same as said second size, and a third shape, which is substantially the same as said second shape, wherein said second jigsaw puzzle depicts a replication of said predetermined scene, whereby said first and second jigsaw puzzles cooperate to provide said puzzle with a multi-dimensional appearance.