The most information learned occurs between birth and the age of three, during this time humans develop more quickly and rapidly than they would at any other point in their life. Love, affection, encouragement and mental stimulation from the parents or guardians of these young children aid in development. At this time in life, the brain is growing rapidly and it is easier for information to be absorbed; parts of the brain can nearly double in a year. During this stage, children need vital nutrients and personal interaction for their brain to grow properly. Children's brains will expand and become more developed in these early years. Although adults play a huge part in early childhood development, the most important way children develop is interaction with other children.