Zen Preschool, surrounded by the slums of Sao Paulo, Brazil, offers full-time day care for children up to four years old. The teachers aim to take in rich or poor and to offer a positive experience of love and attention. "Children need to feel cared for, loved, and learn to express their emotions," a teacher points out. Unusual offerings include yoga and meditation, as teachers attempt to develop each child's cognitive, intellectual, physical and creative sides.