Kids A puzzle expert shows off some of his favorites Andrea James

puzzles Coin puzzle: How do you make a circle of 6 coins from two rows in only 3 turns? Carla Sinclair

Kids Watch how to solve a maze hidden inside a metal cylinder Andrea James

puzzles Weird Al Yankovic co-authored today's New York Times crowssword puzzle David Pescovitz

puzzles Can you solve the seven planets riddle? David Pescovitz

Japan Absolutely brutal single color jigsaw puzzles David Pescovitz

puzzles Can you solve the dark room coin riddle? Mark Frauenfelder

puzzles Surprising result of calculating speeds of two cars hitting a tree Mark Frauenfelder

puzzles How to solve a masyu logic puzzle Mark Frauenfelder

puzzles Cave puzzles look like fun – here's how to solve them Mark Frauenfelder

toys Four ninths of a Rubik's Cube Rob Beschizza

puzzles Geode jigsaw puzzles Rusty Blazenhoff

puzzles Zenth is a 3D wooden labyrinth Mark Frauenfelder

puzzles How to fold a fitted sheet Mark Frauenfelder

puzzles Area Mazes – fun puzzles by a master puzzle inventor Mark Frauenfelder

puzzles The Instant Insanity puzzle Mark Frauenfelder

puzzles Look how smoothly this mini-Rubik's Cube turns Mark Frauenfelder

puzzles "Moyu Weilong GTS2" is the best Rubik's Cube Mark Frauenfelder

puzzles Giant jigsaw puzzle took 9 months to complete – watch a timelapse Mark Frauenfelder