The challenge is to photograph something that depicts the subject matter of ‘wrinkles’. The aim of the photograph is that firstly the person guessing does have a chance of getting it right but not too easily. Try to see if you can take a photograph that will need the least editing possible. The idea being to use angles, light, shadow & to perhaps find something even mundane that one can make look extraordinary or complex. The end result being that when the guessing is finally over those trying to work it out will slap their thigh and say “I can’t believe it was something so simple, I just couldn’t see it, but now it’s obvious.”
I look forward to reading your guesses!