You’ve seen these kids. They stand apart at recess, with no one to talk to while other children hang out in small groups, run around raucously or play games. Or you may have seen them at lunch, sitting conspicuously alone, head down, at a long empty table. That’s what it looks like to be fat-shamed and shunned by your peers when you’re an obese child. This rejection starts as early as first grade, according to a recent study. Schools can intervene, but the best help starts at home, a Swedish psychiatrist says.