Build a Joint Mechanism

Turn a straw into a simple machine that works in the same way that the joints in your body work.

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Inspiration Video

Suggested Materials

  • bendy straws
  • string or fishing line
  • scissors
  • tape
  • push-pin

Difficulty Level

1
2
3

This design challenge requires simple motor skills, understanding of straightforward concepts, or common materials to build.

This is the difficulty level for a typical 4th grade classroom. Modify as needed for other age groups.