Swimming with a snorkel is interesting even a pool because you can learn how to use your breath.
It's possible to go under water with the entire snorkel tube without removing it to breath again. Let's see how you can do this.
Take a big breath and block the whole of the air tube with your tongue, go under water don't breathe. When your tube gets back to the surface, blow all the air out of your lungs through the air tube to empty it from water. After this you'll be able to breath again through the tube.
Now you can go under water. To exercise this you can use an object to pick off the bottom of the pool.
