puzzles Martin Gardner puzzle: red, white, and blue weights Mark Frauenfelder

puzzles Interview with Adam Rubin, director of puzzles and games for The Art of Play Mark Frauenfelder

puzzles Sphaera – a difficult dexterity puzzle Mark Frauenfelder

puzzles This "simple" nail puzzle has kept me amused for hours Mark Frauenfelder

puzzles Gallery of photos you might not immediately realize all include dildos Rob Beschizza

puzzles Excellent $5 puzzle book: The Moscow Puzzles: 359 Mathematical Recreations Mark Frauenfelder

puzzles Can we wrap a 1x1x1 cube with the blue 3×3 piece of paper, cutting along some edges without disconnecting it? Mark Frauenfelder

puzzles Can you solve the virus riddle? Mark Frauenfelder

puzzles A hat puzzle Mark Frauenfelder

puzzles This man is the master at making hedge mazes David Pescovitz

puzzles Five cool mass-market puzzles Mark Frauenfelder

puzzles The Eureka disentanglement puzzle Mark Frauenfelder

videos Make: Soviet themed launch-code box complete with missile switch covered toggles Cory Doctorow

puzzles Raymond Smullyan on the Tonight Show 1982 Mark Frauenfelder

puzzles Puzzle: the lazy electrician Mark Frauenfelder

puzzles Interesting puzzles from the 2017 toy fair in Nuremberg, Germany Mark Frauenfelder

puzzles RIP Raymond Smullyan, Puzzle-Creating Logician Mark Frauenfelder

puzzles The Lotus Box – an extraordinary and surprising puzzle Mark Frauenfelder

puzzles Beautiful wooden safe cracking puzzle Jason Weisberger

puzzles This jigsaw puzzle has no border Mark Frauenfelder