"If you don't float - for some odd and mysterious reason, you sit or stand back up and keep your head out of water. Won't be a problem. We'll keep to the shallows on the off chance that you were born with magical sinking properties." It was all stated very matter-of-factly.
"And you float by doing what I did earlier. You stretch out on the water, kinda tilt your head and legs a little to balance out, and you float. There really isn't much to it."
Molly realized there were perhaps a few things Rena needed to know about water. "Do you realize that you actually weigh lots less in the water? That were we to go deep enough I could stand - that deep only because it would give me the leverage of standing - I could lift you up? I could do it with barely any effort, I'm sure. But that's water for you."