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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...

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What you need

A cone shaped party hat


A soft ball

A friend


  1. Cut the tip off the party hat to make a hole about 2cm in diameter.
  2. Wear the hat over your face.
  3. Try to play catch with your friend using a soft ball.

Results & explanation

When you’re wearing the hat you can only see with one eye at a time.  Without your normal, two-eyed, binocular vision you can’t judge distances as well and it’s much harder to catch the ball.

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