We came across this headline recently: http://www.bbc.co.uk/news/av/uk-england-stoke-staffordshire-40430970/boy-5-saves-brother-from-choking-on-meatball
Oliver Bevans saved his little brother from choking by applying first aid techniques that he had learnt from school. This story shows that emergencies can happen anywhere at any time, and it is essential to know what to do when an emergency strikes.
This also proves that first aid should be taught in the school curriculum as you are never too young to learn the basics of first aid.