Μικρό αγόρι σε λευκό παλτό κρατώντας δοκιμαστικούς σωλήνες με αντιδραστήρια σε χημικό εργαστήριο - Φωτογραφίες & Εικόνες Αρχείου

Schoolboy in white lab coat taking notes during scientific experiment

Cheerful boy with goggles smiling near blurred test tubes and microscope

Little boy in chemical laboratory choosing reagents in test tubes

Asian Chinese boy holding test tube for research in isolated plain white background.

Little boy and girl in white coats using microscopes and reagents in chemical laboratory

Little boy ang girl in white coats using microscope in chemical laboratory

School boy wearing protection glasses doing chemistry experiment in elementary science class and mix components. Clever pupil in lab during test

Little boy and girl in white coats using microscope in chemical laboratory

Little girl making notes and smiling at camera in chemical laboratory

Concentrated little girl in lab coat making experiment in chemical laboratory

Little boy in lab coat holding flask with reagent in chemical laboratory

Little girl using microscope and boy making notes in chemical laboratory

Little boy and girl in white coats using microscope and looking at each other in lab

Little boy in chemical laboratory choosing reagents in test tubes

Cute little boy in lab coat holding flasks with reagents and smiling at camera