In the UK, keeping children safe means babyproofing your home or teaching youngsters to look both ways before crossing the road.
In Afghanistan, it could mean stopping children dying from diseases picked up from human waste.
More than just a nuisance
For most people in Britain, diarrhoea is a nuisance that can be easily treated. If a child is very badly affected, care is always available.
But in some countries, diarrhoea is life threatening.
Nearly 1.3 million children under five die from diarrhoea worldwide, making it the second most common cause of child deaths.
In fact, over half of these deaths occur in just five countries. Afghanistan is one of them.
What makes this even sadder is that children’s lives could be saved if communities had clean water, toilets and hand-washing facilities.