Ключевые слова: background, blackboard, board, boy, bulb, caucasian, chalkboard, challenge, child, childhood, class, classroom, concept, desk, drawing, education, educational, elementary, girl, green, hand, handsome, happy, idea, indoor, innocence, intelligent, kid, knowledge, learn, light, little, male, motivate, nerd, page, person, preschool, pupil, school, schoolboy, schoolchild, small, solution, son, space, student, study, success, think,