Throughout his first two terms at school, Jacob was unaware that his best friend, Kiefer, had an identical twin in the other reception class.
At the Easter service Jacob, sitting next to his best mate, let his eyes wander round the church. Eventually he looked behind - and spotted Kiefer's brother. Jacob's head turned rapidly from one twin to the other. His expression changed from contentment to amazement.
Finally he shouted out: "Oh my God, there are two of them."