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DIY Science Projects

How to use ? - A coin top

  • Step 1

    Place a drawing pin (point up) in the center of a coin.

     

    Push a piece of adhesif tape of about 5 cm through the pin.



  • Step 2

    Turn the COIN over and pass the tape on another pin placed about 1mm from the centre of the coin.



  • Step 3

    Surround the coin with another tape, perpendicular to the first on, fixing it on the two pins.



  • Step 4

    Cut about 1cm of a pencil.

     

    To do so, gradually cut the wood until it breaks effortlessly.



  • Step 5

    Push the wooden part of the pencil (not the lead) on the top pin (the one slightly off-centre)



  • Step 6

    Check that the bottom pin is right in the center of the coin.

     

    Check that the pencil perfectly centered and perpendicular to the coin.

     

    Now just spin it !


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