Why do I see kids wearing what looks like hard hats in anime?

why do I see kids wearing what looks like hard hats in anime?
pic related

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For safety.
But they are not actually hard.

Japan is under constant, daily threat of earthquakes and meteor showers.

It's so japanese trucks can see them better.

Kanna is so goddam cute

It mean they love sex.

I'm never sure who is serious

Yellow hat + red randoseru = ready for sex.

For the sun heatstrokes aren't funny

But when will kids switch to the superior origami helmet?

youtube.com/watch?v=zAaus-XTfwU