This “Reflections” article reviews the recently released documentary by Carlota Nelson, Brain Matters. The film focuses on the first three years of life when a baby’s brain is optimized for learning, highlighting evidence that child development interventions during this period yield lifetime developmental benefits. The film details four essential “brain boosting experiences” during this period, including responsive care, language stimulation, opportunities for play, and good nutrition. The review concludes that the film offers a compelling argument in support of ECD programs.