Children with hearing impairments have barriers to the development of their oral skills. Different systems are used for communication, such as sign language and fingerspelling language. The latter supports literacy teaching to deaf children, who may have difficulties in the learning process in specialized institutes, and, most commonly, in regular schools. This paper evidences the need to propose new mechanisms to support the teaching process. Technology presents a potential solution for this problem. The paper presents the design of an interactive system (video game), which can serve as support for the process of teaching vowels to deaf children between 4 and 8 years.