One of the most surprising things about whales is that they are mammals, yet they spend their entire life in the oceans. Being mammals, they breathe air. So we work a lot on breath with the children. Close your eyes, put your fingers on your nose and slowly move them up you forehead, over the top of your head to the back of your neck. That's where your blowhole would be if you were a whale.
Whales make a tremendous sound as they let their air out.
On quiet days it can be heard for several miles. Everyone try it on your own. Let's try to make the sound of one whale breathing. First let me see your hands above your head. Open them and close them.