This is the easiest catapult project to build, yet it's incredibly durable and effective due to it's pyramid structure.
Just transform 2D triangles - which are strong in themselves - into a super-strong 3D shape!
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Tips and Troubleshooting
If the catapult isn't firing far, then...
Make sure to fire by pulling back on the back of the catapult arm (the tips of the skewers), and release by letting you fingers slip off of the arm