Children who have difficulty in the development of pre-language skills may go on to have verbal language and interaction difficulties. Identifying and working on the development of pre-language skills at an early age can prevent difficulties with verbal language later in the child’s life. There are also other medical situations where vocal development might be required. Sensory has a range of voice input apps, that provide an interactive experience to encourage voice development and moderation. These apps can help with sound level, frequency, fricatives and audio generated cause and effect.