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Watch this one together

~5 min · materials: a clear glass of water and a straight straw, pencil, or spoon

Why does a spoon look bent in water?

The spoon is straight before and after the glass. Inside water it looks kinked. What moved: metal or light?

Talk about it

  • The spoon is straight before and after the glass. Inside water it looks kinked. What moved: metal or light?
  • Before the reveal, ask: “Where will the coin appear?”
  • Afterward, ask the child to point to the cause and the measured result.
Watch it together

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