Users who get the answer wrong are asked to change their Facebook profile to a giraffe for three days, in the interest of confusing or intriguing the online community into playing the game.
Here's the riddle:
It’s 3 a.m., the doorbell rings and you wake up. Unexpected visitors! It’s your parents and they are here for breakfast. You have strawberry jam, honey, wine, bread and cheese. What is the first thing you open?
It's unclear what the riddle has to do with giraffes, except that they're cute and random enough for an Internet culture that likes corgis, hedgehogs and slow lorises.
According to the Chicago Tribune, both "you eyes" and "the door" are acceptable answers to the riddle, with some Facebook users arguing that you would open your eyes before you do anything else.
According to the CBC, the "Great Giraffe Riddle Challenge" started with a New Zealand video blogger named Andrew Strugnell.
Here's Strugnell's original post, which potential game-players are encouraged to repost on their own pages:
I've changed my profile to a giraffe. I tried to answer a riddle and got it wrong. Try the great giraffe challenge!
The deal is I give you a riddle. You get it right you get to keep your profile pic. You get it wrong and you change your profile pic to a Giraffe for the next 3 days. MESSAGE ME ONLY SO YOU DONT GIVE OUT THE ANSWER.
Here is the riddle: 3:00 am, the doorbell rings and you wake up. Unexpected visitors, It's your parents and they are there for breakfast. You have strawberry jam, honey, wine, bread and cheese. What is the first thing you open?
Remember... message me only. If you get it right I'll post your name here. If you get it wrong change your profile pic.