Features and uses: can perceive and distinguish the size, quantity, height and length of objects, and can be expressed in corresponding words. In this paper, the goal is to distinguish the size of objects, and make related game teaching AIDS, aiming to let children learn the methods and abilities of comparing two or more objects in mathematical games. Playing with teaching AIDS is an indispensable carrier of kindergarten teaching and children's activities, which is of great value to the development of children's creativity, hands-on ability and independent inquiry ability, and is the main medium for children's growth and development.