This was an experiment in how far the air engine I had previously designed would propel an open chassis vehicle using balloon power. Ran 50 feet on concrete.
A pool toy I designed for the grandkids.
Fab Lab Tulsa asked me to design a boat for their boat race challenge, and I gladly accepted!
An animated Hummingbird I designed for my wife, who loves hummingbirds.
Animated / exploding Darth Vader model.