UNSW Sydney provides funding as a member of The Conversation AU. I remember, as a child, being fascinated by how just seven simple wooden triangles and other shapes could offer endless entertainment.

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What we have here is the EverReady battery of puzzles. It just keeps going and going. Each of these figures is built from the same 7 elements: two big triangles, two small triangles, one medium size ...

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The tangram was the first ever puzzle craze – and it is still going strong. You may have come across it before. You are shown a shape, and you must arrange seven pieces – five triangles, a square and ...