Ages 9-16+


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Launch an interest in STEM and engineer a working trebuchet. Experiment with aim and angles by adjusting the weigh in your trebuchet. Explore the science of levers and how they help machines (like seesaws and trebuchets) harness the force of gravity and lift heavy weights. Ready, aim, and fire — with physics!

Includes illustrated blueprint instructions, materials, and a special-edition Tinker Zine magazine to learn more about awesome launching machines.


  • Build the trebuchet base
  • Build the counterweight
  • Build the lever arm and firing pin
  • Put it all together!


  • Levers
  • Trajectory
  • History of Trebuchets

Using charter school funds?

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