There are not many places in our city where you can send children to good additional courses that comprehensively develop a child. I know what mental arithmetic is by myself. It helps in everyday life, perfectly improves memory, helps to become independent. With the advent of modern technology, children (and adults) count even elementary actions in their minds less and less often. But the brain needs constant training, just like the muscles. Smartum Academy is one of the few that offers such services.