A chibi-style submarine that can freely control its buoyancy while snorkeling—printed in just one hour.

It employs multi-density printing to ensure the submarine’s center of gravity remains stable, allowing it to float smoothly on the water’s surface.

Its uniquely designed hollow structure enables precise depth control: by adjusting the amount of water filled inside, the submarine can be made to dive to different depths.

I’m confident this mini, adorable submarine will quickly become a beloved toy that kids can’t put down in their bathtubs.