make a badge for solving it! its a hard riddle (if you dont cheat)
"only 2 percent of the world's population can solve it"
if you want to cheat look at einstiens real riddle on wikipedia. its similair to this one. with some names switched out. birds=snails and fox-cats.
 "Libra"){kind=icon}
 "Einstein's Riddle"){kind=icon}
 "Tower of Greed"){kind=icon}