The word jigsaw relates to the original method of manufacture of the earliest jigsaw puzzles which involved using a picture painted onto a piece of flat wood cut it into several pieces with a jigsaw. These original wooden jigsaw puzzles were manufactured as early as the middle of the 18th century in England and, because they were cut by hand, had loose fitting pieces and irregular shapes. Jigsaw puzzles are an unusual yet enduring pastime. Despi...