The same day the interview was posted, a hint, "s & o are the key" and a puzzle featuring an image of what appeared to be roller coaster track was found.

He also displayed an 1876 puzzle featuring the buildings of that year's Phildadelphia Centennial Exposition.

Edward Nygma's Puzzle Web Site : puzzles, games and stories featuring the animated series Riddler.

A lesson plan (including crossword puzzles featuring phrases like 'digital theft' and 'Movielink') created in conjunction with Junior Achievement.

Beat the clock to assemble a puzzle featuring the Sacagawea Golden Dollar.

Jumble - A twist on a sliding puzzle featuring a constantly changing animation.

Donruss, again, produced the 60-card "Action All-Star" set, with this year's 63-piece puzzle featuring Ted Williams, and created another 3 " by 5" 60-card set called "Champions".

Baguenaudier (also known as the Chinese Rings, Cardan's Suspension, Cardano's Rings, Devil's needle or five pillars puzzle) is a mechanical puzzle featuring a double loop of string which must be disentangled from a sequence of rings on interlinked pillars.

It also has a puzzle featuring a CT scanner.