A simple smile from you can improve your baby’s self image and brain development.

When babies see you smile, it causes chemicals to be released in their bodies. This makes them feel good. The chemicals (called opiates) also help babies' brains to grow.
Most of us can’t help smiling at our babies every chance we get. The urge to make them smile back can keep us busy for hours.
Smiling at your baby is important because it:
Babies and young children also read their parents’ faces. They use parents’ facial expressions as a guide for behaviour.
The emotional experiences a child has with other people (especially experiences during the first years) help shape emotional responses throughout life. It is through interaction with other minds that children develop their own minds and emotions.
Scientific research tells us that when the connection is made between a parent and child, it is helped along by chemical reactions in the body. On the other hand, if a baby is feeling insecure or stressed, the levels of stress hormones in baby’s body increase. These different chemicals interact with the baby’s nervous system, and even play a role in how the brain grows and develops.
The scientific side of smiling has been investigated by researchers looking at chemicals in the body and brain activity. The research tells us that a simple smile can lead to an important series of events.
It’s worth remembering that a simple smile is one building block for your relationship with your child. Your face is where your child looks for reassuring, comforting responses and attention.
Not every single response you give is vital – but each smile your baby catches sends a good message.
Gerhardt, S. (2004). Why love matters: how affection shapes a babies brain. London, UK: Brunner-Routledge.