Kiddie talk is a form of language used by young children, typically between the ages of two and five. It is characterized by simplified grammar and vocabulary, as well as mispronunciations and incorrect word order. The term 'kiddie talk' is derived from the acronym LISP, which stands for Language Impairment in Speech and Pragmatics. This type of language impairment is common among young children and can be caused by a variety of factors, including developmental delays, hearing loss, or autism spectrum disorder.