Getting babies to be active isn’t rocket science: Put a 3-month-old briefly on his tummy and watch him struggle to lift his head. Move an infant’s hands to play patty-cake. Provide crawlers with sturdy furniture to pull on and soon they’ll stand. But too many tots are confined for long periods in strollers, baby seats or playpens when they should be moving around, says the National Association for Sport and Physical Activity. Instead, babies, toddlers and preschoolers need simple but targeted daily activities that are crucial building blocks in learning to walk, run and eventually do all the other tasks the rest of us take for granted, the association says […]