John Lennon captivated millions when he sang "Imagine" in an appeal against war, poverty and hunger.

April Rose Chiong and Metodio "John" Maraguinot are not John Lennon, but they sang their hearts out about what they "imagine" for the future of children -- a world safe from abuse, violence and exploitation.

Chiong, 14, and Maraguinot, 18, are child rights activists from the Philippines and representatives of a national children's council supported by World Vision, a Christian nongovernmental development organization.

The two were among more than 90 children and youth delegates attending the Second World Congress Against Commercial Sexual Exploitation of Children in Yokohama.