By blowing or tapping against bottles filled with water, the air in the bottle vibrates and makes a sound.

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Size: 4098px × 2739px
Photo credit: © Ron Giling / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: air, blow, blowing, bottle, bottles, boy, child, children, europe, girl, lesson, music, netherlands, primary, school, sound, tapping, vibrate, vibrating, water