While on a speech therapy session at home , working with my son on sound transitions, we got this idea of using this technique for improving working memory or short term memory. It's fun and serves dual purpose.
Quite often, our children develop obsessions to a particular activity or routine and may exhibit narrow interests. For instance, I have heard many parents expressing concerns about their child watching the same track of music or video again and again. This may continue to exist for several months or even years. There are many reasons that are attributable to such repetitive and obsessive behaviors. Lack of ideation, anxiety, sensory preferences, mere source of pleasure or could be as simple as a way of coping up every day life.