Challenge: Swim around the circle.
Like the dolphin, move around the hoop.
Instructor holds the hula hoop at the surface.
Beginners: Walk around the hula hoop keeping the back of head touching the hoop. Do 1 full rotation around the OUTSIDE of the hoop.
Beginners: Do it again, but on the inside, and have your nose touching the hoop.
Advanced: Swim around the hula hoop, on the outside, with your head touching the hoop at all times. With face in the water if possible.