Jul 262022
 

Book printed in and about Esperanto was published for the first time in 1887. L. L. Zamenhof wrote Unua Libro. Children could visit a website discussing Esperanto at: Esperanto. Children could also read almost 100 books in Esperanto at: Project Gutenberg.

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Oct 112022
 
Macaroni Box Comptometer

Macaroni Box Comptometer

Comptometer, the first accurate adding machine, was patented by Dorr Eugene Felt in 1887. Made from a macaroni box and rubber bands, the prototype earned patent number 371,496. Felt and his partner became financially successful, and he held 46 other patents. The original macaroni box prototype is now part of the Smithsonian collection. Older children could learn more at: Comptometer.

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