Kids love riddles and, considering the popularity of the giraffe riddle that took over Facebook this fall, it’s pretty clear that the love of these kinds of puzzles is something we don’t outgrow.

Juergen Schwarz/dapd/AP
Giraffe riddle: A male giraffe calf Ng'ombe stands in front of his mother Nyiri at the zoo in Cologne, Germany, Friday, Jan. 20, 2012. Giraffe pictures are taking over Facebook as part of a viral giraffe riddle game.