56 original one-of-a-kind artworks created by Ivan Moscovich in his home studio using an elaborate double-pendulum drawing mechanism of his design.
Read moreA pirate captain presents his prisoner with eight golden coins and a challenge: if the prisoner can identify the single genuine gold doubloon in th...
Read moreThe "Burr," "Knot" or "Chinese Cross" is one of the oldest and most popular mechanical puzzles in the world. The origin of the puzzle is unknown bu...
Read moreThe "Droste effect" refers to the technique of creating a recursive image or, put more simply, a picture inside of itself. The Droste effect gets i...
Read moreThe Zoetrope or “wheel of life” is an analog animation device that predates the dawn of cinema. Invented by William George Horner in 1834, the mach...
Read moreThe nine dot problem is a classic lateral thinking exercise that gained widespread popularity in the 1970's and 80's. Participants are presented wi...
Read moreOver the years we've gathered a collection of unique, sometimes strange, ways to use a playing card. These are practical uses of a playing card bey...
Read moreAt the close of the American Civil War Colonel Robert J. Morgan captured the industrialism of a rebuilding nation and founded what would one day be...
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