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Create a straw flute

You will need:

  • A plastic straw and some scissors
  • Adult help with the scissors where needed


  1. Cut the end of the straw into a point as per the video shown.
  2. Insert the pointed end of the straw into your mouth and blow.
  3. If the pointed end is in the correct spot in your mouth you will get the ends to vibrate.
  4. Carefully cut the straw as you blow through the straw... the sound will get higher!

When you look at the light as it shines through the glass of water in the box, you should see that the rectangle of light on the paper spreads out. As light enters the water in the glass, it is bent, because light moves more slowly through water than air. This makes the light ‘spread out’ so it creates a broader beam of light.
Bending light is called 'refraction'. 

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