Entertaiment can involve a public performance, such as watching a play, opera, television show or film; or an intimate and private activity, such as recreation and leisure activities, sports, music, dance and games. The nature of entertainment changes with advances in technology, but many familiar forms remain constant; such as storytelling, music, theatre and games. Children’s entertainment often involves mimicking adult behaviour – for example in role playing and emulating performances or observing adults during play – and is essential to their growth. It also develops social skills. The word is sometimes abbreviated to entmt on fliers, in industry news publications and short hand note taking.