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A comment on Show HN: Sketch, connect and simulate gears and chains.
http://www.amazon.com/Mindstorms-Children-Computers-Powerful...
In the intro of the book Seymour A. Papert describes how gears provided an early concrete framework that made understanding abstract mathematical concepts presented at a later point much easier to visualize and apply.
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http://www.amazon.com/Mindstorms-Children-Computers-Powerful...
In the intro of the book Seymour A. Papert describes how gears provided an early concrete framework that made understanding abstract mathematical concepts presented at a later point much easier to visualize and apply.