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Porcupine Progression

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Set of nails on wooden block called Porcupine Progression

Porcupine Progression

Very challenging engineering task for small groups.

  • Fascinating puzzle
  • Inspires creativity
  • Fosters critical thinking
  • Ideal small group initiative

Step-by-Step Instructions

  1. In advance, hammer one nail partially (vertically) into the centre of the block of wood, ie approx 10mm.
  2. Lay the other 12 nails next to the block of wood.
  3. Challenge your group to balance all 12 nails on top of the vertical nail.
  4. Announce that all nails (as a group) must be balanced on top of the nail at the same time.
  5. None of the 12 nails is permitted to touch the wood (or any other apparatus.)
  6. Allow up to 30+ minutes to solve the problem.
  7. Encourage innovation, especially those ideas that reflect thoughts of engineering.

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Add your Comments...

Have you played this activity? What worked, what didn't work? What type of group? Do you have useful advice for other users? Do you know a fun variation?

Comments (6)

  1. Pattie Money

    I’d love to see a video or picture of the outcome. Thanks so much! Pattie

    Reply
    • Mark Collard

      Some inspiration is on its way to you, Pattie 🙂

  2. Staff OpenConnections

    Hello Mark,

    I and my colleagues are big fans of Playmeo; thank you and your team for engaging, challenging and fun activities.

    I would love to have an image of the solution you allude to. Happy to “not get it” with the group (12-15yo) as they are attempting to figure it out, but would love to follow up with them later with your version of the “answer”.

    If theirs is different, but viable, I’ll share a photo with you, thanks!
    Lisa

    Reply
  3. Fabio

    Hi it’s possible to see te solution? Thanks

    Reply
    • Mark Collard

      Yes Mario, there is a document we have prepared that showcases one possible solution – we have emailed it to you.

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