It can float in water and you can drive it through water. I used a Lego ship bottom, four large water bottles, a hand full of zipties, Lego bricks, and parts from my EV3 kit. It uses the IR controller so that I can drive it. I had to put water bottles on the side of the ship so that it would not sink from the weight of the parts. I also made special propeller parts in the back. They are attached to the large motors so that it can turn the propellers. It has a color sensor on the front to look like a light. The EV3 Ship has a program that I use to drive it because I can make honking sound like a ship.
MindTechnic 