Another Balloon Boat
cults3d
I designed and printed a balloon powered boat for my son's birthday a few years ago. Blow up a balloon and stretch the balloon opening over the hole at the top. I did find that once the balloon is attached, it's easier to inflate by blowing into the bottom of the boat rather than taking the balloon off each time. There are 2 prints, the boat and a name plate that you can edit or just make one in the software of your choice - it's a 70 x 22 x 5 mm slab with a name cutout. The boat works just fine without the nameplate.
With this file you will be able to print Another Balloon Boat with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Another Balloon Boat.