Νεαρός χημικός λειτουργεί στο εργαστήριο. Το αγόρι στο προστατευτικά γυαλιά εξετάζει τις χημικές φιάλες με υγρό. Χαριτωμένο αγόρι αγγίζει λάμπα με πορτοκαλί υγρό. Πειράματα στο εργαστήριο χημείας. - Πλάνα & Βίντεο Αρχείου

Young chemist works in laboratory. The boy in protective glasses mixes orange liquid in a flask. Chemical experiments in laboratory.

Chemical experiments for children. Woman places the test tubes, and the girl waits. Fun experiments for children. A woman conducts cognitive science lessons. Fun games for children. Children stand at

KAZAN, TATARSTAN RUSSIA - APRIL 24 2018: Chemical laboratory with different glassware and blond girl lab assistant pours transparent liquid into small glass making sample pink on April 24 in Kazan

Scientist prepares to experiment in laboratory. The woman sets the flasks on the special stand before the experiments.

Young chemist works in laboratory. The boy in protective glasses mixes orange liquid in a flask. Chemical experiments in laboratory.

Scientist prepares to experiment in laboratory. The woman sets the flasks on the special stand before the experiments.

Cute boy strews a starch on a fire in laboratory. Suddenly the fire flashes. Young chemist discovers world of chemistry for himself and makes chemical experiments in the laboratory.

Close-up of Caucasian teenage chemist sniffing chemicals. Curly-haired boy in lab coat looking into flasks filled with liquids. Intelligence, chemistry, genius, generation Z. Cinema 4k ProRes HQ

Young scientist makes chemical experiments with colorful liquid. Hes holding flask with pink liquid in hands and research it. Laboratory experiments with liquid.

Laboratory assistant and his pupil makes chemical experiments with dry ice. They holding flasks with colorful liquids in hands. The flasks is steaming and young scientists looks after the reaction of