Sound – what is it? We all seem to know this but can we explain this to our children? At the workshop “Testing testing can you hear me?” we will try to tell you more about this phenomenon, and try to make a string phone and perform other experiments. We will talk about what music is, what produces sounds, about out own voices, about vibrations and low-pitched and high-pitched tones. During all workshops at the Bzzz! gallery, we encourage children to draw conclusions from what they observe, and we also encourage them to ask any question that comes to their mind.