Bold Bridges

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Science, Physical Science

Grade 3- 5


Students will learn about the concept of strength of geometric shapes by building different types of bridges. Students will also learn about what types of forces are felt most strongly by bridges.


This is a student-driven activity that your students will love. Start the activity by discussing how bridges are designed and built. Check out the websites below for information on this topic. Show the students the different materials they have at their disposal. Then, give them the activity sheets and let them build those bridges!


  • copies of bridge building directions (see downloadable PDF file)
  • straws
  • straight pins
  • scissors
  • fishing line
  • pennies
  • small Styrofoam trays
  • large paper clips
  • string

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