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...

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What you need

Pencil with a rubber on the end

Drawing pin

Drinking straw

Sticky tape


  1. Insert the long end of the straw into the balloon and tape it in place.
  2. Push the drawing pin through any part of the long end of the straw to attach it to the pencil’s rubber.Bend the short end.
  3. Blow up the balloon using the straw, release, and watch it spin!
  4. Try changing the position of the drawing pin and the angle of the short end to make it spin faster.

Results & explanation

The air rushes along the straw and around the bend. As the straw pushes on the air to force it round the corner, the air pushes back on the straw; making it move.


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