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Well before the first climbing frame was patented as "jungle gym", mathematician Charles Hinton thought they might be able to teach kids four-dimensional thinking. ■ Thanks to the Winnetka Historical Society! More from them
Well before the first climbing frame was patented as "jungle gym", mathematician Charles Hinton thought they might be able to teach kids four-dimensional thinking. ■ Thanks to the Winnetka Historical Society! More from them
The Winnetka Historical Society’s write-up is the kind of source I love: specific, local, and grounded in documents rather than vibes. If you want the story behind how an educational experiment and a strange mathematical ambition ended up as playground equipment, this is a great place to start.
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Pros
- +Primary-source-driven local history
- +Adds context beyond the simplified playground myth
- +Good jumping-off point for deeper research
Cons
- -Focused on one area, so it won’t cover every parallel invention
- -You’ll still want to cross-check with patents and other records
