Wet sub

Okay, so imagine you're swimming in a big pool and you have a special toy submarine that can go underwater with you. But instead of staying dry inside the submarine, you're actually getting wet because the submarine doesn't have a top on it!

That's kind of like what a wet sub is. It's a special kind of submarine that people can use to explore underwater while also getting wet at the same time. Instead of being completely sealed off like a regular submarine, it has openings that let in water so that people can swim around and explore the ocean while still being protected from the pressure and the cold.

It's kind of like a giant scuba diving suit that you can drive around underwater, and it's used by scientists, divers, and explorers to study the ocean and discover new things that we might not have ever known about otherwise. So if you ever get the chance to go on a wet sub adventure, you'll be able to see all sorts of cool things underwater while feeling like you're swimming right alongside them!