Abstract: A device for promoting effective oral hygiene by a child includes a base, a model of a set of teeth connected to the base, an indicator connected to the model or the base and configured to indicate a first subset of the set of teeth, and a processor connected to the indicator. The processor is configured to cause the indicator to indicate the first subset to thereby instruct the child to brush the child's teeth corresponding to the first subset, and to cause the indicator to subsequently indicate a second subset of the set of teeth, different from the first set, to thereby instruct the child to brush the child's teeth corresponding to the second subset. The first subset corresponds to a first recommended tooth-brushing zone of the child's mouth and the second subset corresponds to a second recommended tooth-brushing zone of the child's mouth.