Globally about 500,000 children die each year due to diarrheal infection, but many lives could be saved with better hand hygiene.

Now a primary school in Kerala, India has taken part in a trial using a robot to encourage children to spend more time washing their hands.

Pepe the robot offers hygiene advice from the World Health Organisation as part of a study by universities in Scotland and India.

The robot's presence prompted a 40% increase in time spent at the sink. The machine's creators believe the robot's facial features are the reason for its success.

BBC Click finds out more.

See more at Click's website and @BBCClick