Some parents will buy any high tech toy if they think it will help their child, but researchers said puzzles help children with math related skills.

有些父母会购买任何高科技玩具，如果他们认为这对孩子有帮助，但研究人员表示，拼图有助于孩子学习数学相关技能。

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Dave Evans, of Guest Book Puzzles, Weymouth said the jigsaw would be made up of 40, 000 pieces and reach 150 sq ft (13.9 sq m).

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"It's very complicated puzzles, " said Coney Island mom Radmila Gordon.

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Art history is often presented with various kinds of puzzles, including how to reconcile what an artist has said about a work when its visual evidence suggests the opposite.

WSJ: Vanitas I | Georges Braque | Denying Death | Masterpiece by E.A. Carmean Jr.