Well what they learn practically stays in their brain because they r totally amazed by what they saw like for example if a child sees a person pretending to strum a guitar they will do the same
because your child is around your family alot they will pick up on little things children are clever like that they can sense tension and share some of your feelings and pick up on words you say
the enviroment can harm a baby if the pairants smoke the baby can brerath in the smoke and get lung problems or if they live in a house or whatever that has damp this could case the child heath...