Ключевые слова: boy, chalkboard, chemical, chemistry, chemists, children, classmates, drawing, education, educational, experiment, eyeglasses, formulas, girl, kids, knowledge, lab, lab coats, laboratory, learn, looking at camera, people, preadolescent, preteen, protective, research, school, schoolboy, schoolchildren, schoolgirl, schooling, science, scientists, study, tuition,