What Can Go Through Glass Without Breaking It? is a simple-sounding riddle with a bright answer. Have a guess, then tap Show Answer.
Need a hint?
You see it every morning when you open the curtains.
Answer and explanation (spoiler!)
The answer is light.
Sunlight and lamplight pass straight through a clear window without leaving a crack or a scratch. That’s exactly why we can see out of windows.
The riddle makes us think of solid objects, like a ball or a stone, which would smash the glass. The answer isn’t an object at all.
Difficulty: Easy · Best for: ages 5 and up
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FAQ
Are there other answers?
Sound can also travel through glass, and so can heat. Light is the classic answer because it passes through so easily.
Why can light pass through glass?
Glass is made in a way that lets light waves travel through it instead of bouncing off, which is why it looks see-through.