Summary In our Feature Report, we begin a three-part series on brain development. In this, the first part, we look at the science behind the theory that says the first three years are the most important time for brain development. We hear from Dr. Daune McGregor, pediatrician at the Hospital for Sick Children about the critical periods in the brain's development and from Educational Psychologist Dona Mathews about the milestones to expect as a child grows. On our Reality Check, National Post Columnist Patricia Pearson laments her inability to get her kids to sleep at the proper time. On our Consumer Segment, Tina Vrlak gives her expert advice on choosing a high chair. And on our Video Diary, Third and Final installment of the Dempsey/Davies family. Carla Dempsey and Joe Davies document the amusing and sometimes difficult times their three year old, Charlotte, is having with the arrival of her twin brothers.

• Documentary