Sunday, June 19, 2016

Mechanically-interesting Father's Day Gift Ideas


The YOT is a shiny metal disc (not a UFO!) that holds a US silver dollar coin. The challenge is to remove the coin without power tools! It relies on a fundamental law of physics - can you solve the puzzle and open the YOT?


Solid stainless steel ring features real-working gears that turn when you spin the outer gear band. Engraved initials, carbon fiber inlays. Gift box.

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