Dutch clean-up 'heroes' turn beach rubbish into art Every parent has watched bemused as excited kids toss aside gifts to play with the boxes instead. But what to do when shells on a tropical beach are ignored in favour of plastic bottle tops? That was the puzzle which confronted Dutchman Ralph Groenheijde when he and his family visited the Costa Rica a few years ago -- which was to spark a passionate crusade to clean up beaches back home in The Netherlands. IMAGES AND SOUNDBITES