Growth Guidelines for Small Classes (Babies Aged 03) As babies grow older, parents need to pay more attention to and understand their babies’ growth status and corresponding parenting knowledge. This article will elaborate on the growth guidelines for small class babies at the age of 03 from four aspects: physical development, emotional cognition, social interaction, and language ability. Physical Development When babies in small classes are three years old, their physical development gradually approaches that of adults. At this time, they can already throw the ball, run, jump, play with children\’s tools, and develop coordinated development of various body movements. Parents should urge their children to actively participate in sports activities.