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2. Jigsaw puzzle - Wikipedia

   en.wikipedia.org/wiki/Jigsaw_puzzle

   Jigsaw puzzles have been used in research studies to study cognitive abilities such as mental rotation visuospatial ability in young children. Typical images on jigsaw puzzles include scenes from nature, buildings, and repetitive designs. Castles and mountains are among traditional subjects, but any picture can be used.

3. John Spilsbury (cartographer) - Wikipedia

   en.wikipedia.org/wiki/John_Spilsbury_(cartographer)

   "Europe divided into its kingdoms, etc." (1766) Believed to be the first purpose-made jigsaw puzzle. John Spilsbury (/I.P.A. spɪlsbəri/ 1739 – 3 April 1769) [1] was a British cartographer and engraver. He is credited as the inventor of the jigsaw puzzle. Spilsbury created them for educational purposes, and called them "Dissected Maps". [2] [3]

4. Puzzle - Wikipedia

   en.wikipedia.org/wiki/Puzzle

   After becoming popular among the public, this kind of teaching aid remained the primary use of jigsaw puzzles until about 1820. [7] The largest puzzle (40,320 pieces) is made by a German game company Ravensburger. [8] The smallest puzzle ever made was created at LaserZentrum Hannover. It is only five square millimeters, the size of a sand grain.

5. Puzzle Mansion - Wikipedia

   en.wikipedia.org/wiki/Puzzle_Mansion

   The building occupied by the Puzzle Mansion started as a rest house for the family of puzzle collector, Georgina Gil-Lacuna and also as a private display site for Gil-Lacuna's finished puzzles. [ 1 ] The concept for the museum was first made in 2011 by puzzle collector Georgina Gil-Lacuna and her son Gino Orda who were concerned on where to ...

6. List of puzzle topics - Wikipedia

   en.wikipedia.org/wiki/List_of_puzzle_topics

   Mechanical puzzle. Ball-in-a-maze puzzle; Burr puzzle; Word puzzle. Acrostic; Daughter in the box; Disentanglement puzzle; Edge-matching puzzle; Egg of Columbus; Eight queens puzzle; Einstein's Puzzle; Eternity puzzle; Fifteen puzzle; Fox, goose and bag of beans puzzle; Geomagic square; Globe puzzle; Graeco-Latin square; Gry; Happy Cube ...

7. Ravensburger - Wikipedia

   en.wikipedia.org/wiki/Ravensburger

   The company focused on children's games and books and specialized books for art, architecture, and hobbies, and from 1962 grew strongly. The company started to produce jigsaw puzzle games in 1964, and in the same year opened subsidiaries in Austria, France, Italy, the Netherlands, Switzerland and the United Kingdom. In 1977, the company split ...