Ключевые слова: abacus, activity, add, addition, arithmetic, boy, calculate, calculation, care, child, childhood, class, concept, count, creative, cute, day, draw, education, elementary, hand, hobby, home, homework, kid, kindergarten, learn, leisure, lesson, lifestyle, little, logic, mathematic, number, play, preschool, preschooler, school, study, write, young,