Most friendships are formed around pre-school age, and these friendships will have a big impact on social skills and behaviour. Building friendships is an important part of development and a child’s choice of peers can have a powerful influence on positive and negative performance and behaviour. Children who surround themselves with good friends will gain better social skills and have positive self-esteem. They are less likely to feel lonely or isolated in comparison to children with no friends or who find it difficult socialising and interacting with other children. Negative peer influences may promote unacceptable social behaviour. For the older child or adolescent, this may then call into question the importance of personal moral standards, or the desire to be accepted by their peers.