How can we tell if our child is developing normally in its first two years? Learn some of the basic developmental milestones in physical growth, personal and social skills, large and small motor skills, and language acquisition. Discover when to seek professional help to assess development, especially for potential problems in hearing and vision. Understand that speech is the most variable area of development. Learn to recognize key motor skill developments. See how symmetry of movement is important, and understand how even a baby rattle is a developmental tool. Learn how recently revised growth charts take ethnic diversity into account.