Very young non- or hardly speaking children with severe disabilities need active guidance to stimulate interaction with their environment in order to develop their communicative and linguistic skills. Augmentative and Alternative Communication (AAC) systems can help this process, provided that they are tuned to this specific user group. LinguaBytes is a research programme, which aims at developing an interactive and adaptive educational toy that stimulates the language and communicative skills of multiplehandicapped children with a developmental age between 1