I was introduced to the world of CAD in 7th grade, with this neat little web-based program called Tinkercad. It became my life for the next few years in middle school, until I took up Fusion 360, which allowed me to express my ideas to the maximum. I also recently started learning SolidWorks, but have not built up too much of a repertoire of designs just yet.
Tinkercad portfolio: https://www.tinkercad.com/users/4oJMFt87RDe-huangyboy
Here is a gallery of my more notable designs throughout the years:
Horten 229
Mark I tank
Super Conqueror tank
An unfinished replica of the Mont Saint Michel
A fountain pen project that I was commissioned to design
Leopard 2A4 [see Building Experience]
Challenger 2
Challenger 3.5
(inspired by the Challenger 3)
Obj 279
A bolt action rollerball pen that I designed and later 3D printed
(Lamy was the original inspiration for this pen)
The final 3D printed versions. Version 2 up top, version 1 on the bottom.
A classical Montblanc-style fountain pen that I intended to be fully 3D printed, except the nib which I made myself out of a stainless steel tube.
The pen actually writes really smoothly, but there were suction/pressure issues when I uncap, causing ink to leak out.
The stainless steel nib up close.