Ευτυχισμένο παιδί κουνώντας τα χέρια στο εργαστήριο - Πλάνα & Βίντεο Αρχείου

Happy boy talking while adding liquids

Elementary School Science Classroom: Smart Boy Mixes Chemicals in Beakers and Cute Girl Writes Down and Analyzes Results with Digital Tablet Computer. Modern Education, Learning Chemistry

A kid boy pouring liquid into a tube

Medical research scientists writes scientific formula on a glass whiteboard with serious face.

Schoolboy adding liquid into test tube with green substance, observing reaction

Happy boy talking while adding liquids

Selective focus of kid mixing liquids near boy

Rack focus of kid looking at burning powder

Attentive african american scientist making analyzing with microscope and writing diagnosis on clipboard

African american scientist in glasses using microscope and then looking at camera

Cute kid taking photo in laboratory