Kinder Surprise eggs have always been a firm favourite among children and, to be fair, adults.
Breaking the egg in two to reveal the bright yellow case and then popping it open to discover the hidden toy is one of life’s greatest pleasures.
But did you realise there is actually a reason for the toy case’s distinctive yellow colour?
When you crack the egg open, and the yellow case sits in the white inside of the shell it becomes clear - the toy is a yolk!
For some this may have been obvious from the start. But over at the Mirror they’ve collected some funny tweets from people who are losing their minds at this newly-realised fact: