Statistics show a growing need for American children to develop healthy nutrition habits and make physical activity a routine part of their day. This article discusses the importance of knowledge about lessons on healthy lifestyles in preschool population to check obesity. By targeting preschoolers, the New York City obesity-prevention program and others across the country operate with the same philosophy as other programs in early-childhood education. The early years, the thinking goes, are a valuable time to instill values and knowledge in the hope of guiding children as they get older.