Each day in the United States, about 4,000 kids smoke their first cigarette. Many of them will become daily smokers. "For teens, it may seem cool to smoke. But tobacco use at a young age can cause immediate and long-term health problems like cancer," says Alexander Prokhorov, M.D., Ph.D., director of the Tobacco Outreach Education Program at MD Anderson.

Recent data shows that the declining number of teen tobacco users...