Atmospheric Pressure
Properties of Matter

Magic Fountain

Enrichment Activity for 5-11 11-14

What you need

  • Plastic cup
  • Bendy straw
  • Scissors
  • Glue or Blu-Tack


  1. With the scissors make a small hole in the bottom of the cup (you might need a friend to help).
  2. Push the straw through the hole so the bendy bit is inside the cup
  3. Glue or use some Blu-Tack to seal the hole and hold the straw in place.
  4. Slowly fill the cup with water. Once the water is past the top of the bend, water will start to flow through the straw.

Results and Explanation

Once the water begins to flow through the straw, the rest of the water follows as it's pulled through.

Atmospheric Pressure
is a special case of Pressure
IOP DOMAINS Physics CPD programme

The IOP is proud to present our new Forces CPD Domain

This is the first of a collection of videos for you to view ahead of our live support sessions for teachers and coaches of physics.

Find out more