Every year, a project called V-Star Change the World brings schoolchildren to a Buddhist temple in Thailand for a day of meditation.

Organisers claim that one million children attended the most recent event at the Phra Dhammakaya temple near Bangkok.

The temple has attracted controversy in the past, with critics claiming the meditation exercise is simply for show, and others likening its activities to a cult.

But the temple believes that when one million children meditate together it can help to change the world.

BBC News went along to find out more.

Video journalist: Aggarat Bansong