Children's dictionaries are unique in that they are tailored specifically towards a particular age group of children. Children's dictionaries focus on where a child is in her development and speak in language that the child can more easily understand.
Children's dictionaries concentrate on each age group of children's specific needs. For instance, each dictionary includes specific words that children of that age group are likely to encounter in their respective grades in school as opposed to, for example, adult words that children of that age are not likely to encounter. These dictionaries also attempt to speak to the experience of the target age group by giving writing examples that are relevant to children instead of adults.