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Marvin and Milo

Explore physics the exciting way, by trying out a simple and fun experiment. This month, Electric Slime Don't forget to check back next month for the next edition...

‹Prev Indestructible Bag Next›

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What you need

  1. Water
  2. Clear plastic watertight bag ( e.g. watertight, resealable food bag)
  3. Some pencils


  1. Fill the plastic bag with water
  2. Push a pencil through the bag
  3. Then another... and another

Results & explanation

The bag doesn't burst because the plastic stretches rather than tears as the pencils are pushed through it. If you take a pencil out you can plug the leak simply by putting it back through the holes.

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