Preschool period is a period when development is fastest and the child actively gains basic concepts. The acquisition of basic skills necessary for understanding mathematics and other sciences in this period constitutes the basis of mathematical knowledge and concepts that are necessary for the child's later school life. Mathematics in preschool period; consists of a series of concepts such as number, measurement, shape, time and space. Concepts develop depending on the child's understanding and experiences. As long as he can observe, touch, taste and hear, the child can understand what is understood. Children aged two or six love to move from one place to another, use their senses, classify objects, cluster, arrange and experience with different materials. Concepts related to mathematics can be included in all areas of early childhood education programs.