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Instructables.com

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  K'nex Double Helix Staircase

  Posted: March 14th, 2010, 1:40pm MDT

  Here's how to build a K'nex double helix staircase.  Plus you can make it as long as you want. make this. make these. make this. make this connect them together twist it so it looks like this.
  By: RyanJBoyer
  
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