I used a program called Rhino 8 for this (https://www.rhino3d.com/) but if you're wanting a powerful and free 3D modeling program of your own, look into Blender3D (https://www.blender.org/).
I'm no expert in either of these programs, but a few tutorials will get you a long way, and I think they are very fun! The possibilities are endless. Plus Blender is great at making animations, and even video games I think?
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