Ключевые слова: boy, chemical reaction, chemical reagents, chemistry lesson, children, classroom, communication, delight, education, exercise, experiment, girl, igen, intelligence, interested, interesting, investigation, involved, lab coat, laboratory glassware, lesson, liquid, participation, practical, protective glasses, pupil, school, school age, science, smart, smart school, special, standing, study, surprise, teacher, test tube, waist up, water, woman,