Ключевые слова: afterschool club, chemistry, child, child care, childhood, children, classroom, club, concept, course, development, discover, education, experiment, explore, formal, help, hobby, interests, kids, knowledge, knowledge day, laboratory, learn, lesson, little, little kids, non formal, older, project, properties, pupil, pupils, school, school club, science, small kids, smart, stem club, student, study, substances, task, teacher, test, themed, together, topic, tubes, younger,