Infants, toddlers and young children develop their vocabulary, sentence length, speech patterns and even the duration of their conversations based on what they have heard from their parents and caregivers. Children who have been exposed to a greater quantity and quality of language and communication often have larger vocabularies and better speech development at age three than children with less language experience. Cognitive development, social skills, literacy achievement and academic skills are also related to children’s language experience and communicative skills. Without sufficient oral language development, children find it difficult to achieve important interpersonal and academic goals, and are more at risk of mental health issues and anti-social behaviour in adolescence.