Slightly off-topic, [start rant] but if you see this, you might want to warn the parents, or notify the lifeguard. Children have drowned when their hair has gotten caught in the intake valve, usually at the bottom of a hot tub and they haven't been able to get loose. The valve has a lot of suction to bring the air in and shoot it out the vents that create the "spa" effect. "Swimming" in a hot tub is VERY DANGEROUS even at home - my d got her hair caught in the intake while swimming in our Jacuzzi bathtub!

Luckily, the valve was on the side of the tub and her head wasn't caught under water. She was just stuck until someone came to her rescue. If her hair had been grabbed 1/2 an inch closer to her head, we wouldn't be going to her graduation this May. [/end rant]