Ключевые слова: back, back to school, basic, basic knowledge, bit, chemical, chemistry, child, child care, childhood, children, classmates, concentrated, concept, day, education, experiment, experimenting, formal, fun, girls, information, kid, knowledge, knowledge day, learn, lesson, liquids, little, little child, little girl, measures, modern, pupil, safety, school, school education, school knowledge, schoolgirl, science, scientific, small, small girl, small kid, student, study, studying, subject, teamwork, upbringing,