Boys and girls learning chemistry and conduct experiments

• african, afro, analyzing, biology, biotechnology, black, bottle, boy, caucasian, chemical, chemist, chemistry, child, childhood, clever, curious, discovery, equipment, experiment, flask, girl, glasses, investigate, kid, knowledge, lab, laboratory, learn, lesson, liquid, looking, mix, research, school, schoolboy, schoolgirl, science, scientific, scientist, sit, study, technology, test, test-tube, tube
• ID: 127623848
• Published: 9Feb2013
• Model: 13591645 13702858 13702873
• 5616 x 3744 pixels