Child Brain Development and The Science of Early Learning
By Madeleine Fitzpatrick<
Your baby is born with most of the brain cells she will ever have, but during her first 12 months in the world, her brain will become increasingly complex. By the time she reaches the age of two, her brain will already be 75 percent of its adult weight. By the age of three, it will have reached 90 percent of its adult weight.
Almost 50 percent of the brain cells your baby is born with will wither and die during the first few years of life. This process, known as neural pruning, organizes the brain and makes it more efficient. The brain learns through experience.