Periodontal disease is one of the most common illnesses in people with Down syndrome. This ailment affects and consumes gums, which can result in pain, loss of teeth and consequently, a bad and negative self-image. The only way to prevent this is through a good dental hygiene. Dimo is a learning system designed to teach the basic foundations of oral care (including prevention and maintenance, among others) to kids with Down syndrome. The method comprises several stages aimed to teach a kid that his mouth can get dirty and the correct usage of the toothbrush in order to achieve an effective dental hygiene and ensure a successful learning of the tooth brushing process. To support the aforementioned process and assist kids to become more autonomous and independent in a so important and basic activity, Dimo also includes an app that serves as the kid’s guide and companion during the brushing activity.