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  • 1 box of flat toothpicks
  • craft glue, wood glue or Elmer's glue
  • cardboard (about 12" x 4")
  • waxed paper
  • paper towels
  • small bucket
  • rock material: gravel, pebbles or sand
  • scoop or plastic cup
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    Complexity level:
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    Time required:
    The glue needs to thoroughly dry (2-3 days) prior to testing the bridge's integrity and ability to bear a load.
    Material availability:
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