Ключевые слова: biology, biotechnology, chalk board, chemical, chemist, chemistry, child, childhood, children, class, classroom, discovery, education, educator, elementary, equipment, experiment, explain, formula, fun, girl, kid, kids, kindergarten, knowledge, lab, laboratory, learn, learning, lesson, people, person, play, pointing, primary, research, school, science, scientific, scientist, smart, solution, student, study, studying, teacher, teaching, technology, test, tube,