Mental Floss: Inside the World’s Only Public Collection of Mechanical Puzzles

New-to-me: a database of mechanical puzzles. “The collection is named after Jerry Slocum, a Chicago-area native who started donating his personal collection of puzzles to the library in 2006. The library now has over 34,000 mechanical puzzles, which, unlike jigsaw and crossword puzzles, tend to feature interconnected pieces that must be physically manipulated in order to solve the problem…. An online database of the collection lets users search by the puzzle’s date of creation, designer, maker, or classification.”