What age is this video appropriate for?

This video is recommended for children aged 7 and up. The science concepts are explained clearly and visually, making them accessible to older kids, while the exciting stunt format keeps it engaging — younger children may enjoy it too but might not follow the physics explanations.

Is this video safe for kids with no inappropriate content?

Yes, this video scores essentially zero across all content concern categories. There is no bad language, violence, sexual content, or advertising, making it one of the cleaner examples of educational YouTube content available.

Could the loud horn sounds be harmful or upsetting to children?

The horn blasts in the video are very loud in person, but through a screen they are unlikely to cause any hearing harm. However, the sudden loud sounds may startle younger children or those who are sensitive to noise, so parents may want to give a heads-up before watching.

Is the glass-shattering demonstration dangerous or scary for kids?

The glass-breaking segment is brief and presented in a controlled, scientific context with a clear explanation of resonant frequency. It is not graphic or frightening — it reads more as a satisfying science payoff than a dangerous stunt.

What will my child actually learn from this video?

Kids will learn about sound waves, pitch and frequency, how eardrums work, the concept of impedance matching, resonant frequency, and how to calculate the speed of sound. The video does an excellent job of making abstract physics concepts concrete and memorable through real-world demonstration.

Is this video connected to any other YouTube channels or is it promotional?

The video features a brief, organic crossover with the YouTube channel 'What's Inside?' — the collaboration is transparent and not a paid promotion. There are no product advertisements or sponsored segments embedded in the content.

Watchly säkerhetsgranskning

World's Largest Horn Shatters Glass

Mark Rober

9:16 · 56,5 mn visningar · 28 november 2018

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Minor FlagsReviewed June 2026

1Minor Flag

2No Issues

This video is safe and genuinely educational for most kids, combining a spectacular large-scale engineering stunt with clear, accurate explanations of sound physics. Mark Rober builds the world's largest horn and uses it to teach concepts like pressure waves, impedance matching, resonant frequency, and even the speed of sound — all in an engaging, hands-on way. The only mild caution is the loud horn sound, which could startle younger viewers or those sensitive to noise.

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World's Largest Horn Shatters Glass

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