Science Fair Projects World

Building a Simple Robot Arm


Create a simple robot arm to understand basic robotics and mechanics.


  • Cardboard
  • Straws
  • String
  • Hot glue gun
  • Scissors
  • Notebook for observations


  1. Cut cardboard into pieces for the arm segments and joints.
  2. Assemble the arm by gluing the segments together with straws as pivot points.
  3. Thread string through the straws to act as tendons for moving the arm.
  4. Attach a handle to the strings to control the arm’s movement.
  5. Test the robot arm by picking up small objects and moving them.
  6. Record your observations in your notebook, noting any difficulties or improvements needed.
  7. Analyze the mechanics of the robot arm and how it mimics human arm movement.