As fast as children whiz from classroom to activity to home and back again, their brains are just as actively and dramatically growing and changing. “These years are critical for brain development, and what they eat affects focus and cognitive skills,” psychiatrist Drew Ramsey, MD, coauthor of The Happiness Diet, says. Food is one of many factors that affect a child’s brain development. The following 10 foods that can help kids stay sharp all day long, and affect brain development well into…