"Moby loves mathematics" is a textbook compiled by the Teaching and Research Center for Learning and Thinking, with *** 18 volumes, each of which corresponds to small class, middle class and large class respectively. When kindergarten children are enlightened in mathematical thinking, the knowledge points involved are all the knowledge points that primary schools need to learn. Light is not only the simple identification of numbers, addition and subtraction of numbers, but also the concepts of parallelism, symmetry, mirror image, graphic combination, average score and order. Small classes sprout, focusing on observation and comparison. The exploration chapter of the middle class focuses on hand-brain interaction and hands-on exercises.