3D modeling / international award at 13
SelfCAD Champ
When I was 13, my friend and I built Candyland from scratch in SelfCAD and won an international 3D award for it. No kit. Just the two of us trying to make a world that looked like sugar and still held together as a model.
That win turned into a couple of years as a SelfCAD ambassador: tutorials, community, teaching other people how to make weird little scenes on purpose. It is still the project that made 3D feel like mine, not like an assignment.