In a poverty-filled area of Paraguay, children play in a chamber orchestra. The instruments make beautiful music, but they are highly unusual. The sounds of a classical guitar come from two big jelly cans. Used x-ray films are the skins of a thumping drum set. An old aluminum salad bowl and strings tuned with forks make a violin. Bottle caps become keys for a saxophone. A chamber orchestra of about 20 children uses these and other instruments fashioned out of recycled materials from a landfill near the Paraguayan capital.