液体を追加しながら話す幸せな少年 - ストックフッテージ＆ビデオ

Happy kid waving hands in laboratory

Selective focus of kid mixing liquids near boy

A kid boy pouring liquid into a tube

Serious little boy playing with chemical 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

Serious little boy playing with chemical liquids

Happy kid waving hands in laboratory

Selective focus of kid mixing liquids near boy

Rack focus of happy kids in laboratory

Selective focus of boy looking through microscope

Selective focus of adorable kids in laboratory

Happy kid taking selfie in laboratory