Ключевые слова: age, analysis, biology, biotechnology, boy, chemical, chemist, chemistry, child, class, classroom, development, discovery, dropper, education, elementary, enjoy, experiment, flask, fun, happy, ideas, kid, knowledge, lab, laboratory, learning, lesson, liquid, little, medicine, microscope, practicing, protection, reaction, research, safety, school, science, scientific, scientist, smart, smile, student, study, test, tube, utensil, workshop, young,