The last few times we've been swimming Sarah's been pretending that there are sharks in the water. She enjoys pretending that she's hunting them, and she bonks them on the nose and then locks them up in a cage.  She says, "Mom, do you see any sharks?"  I'll walk around the pool and yell out, "There's one right now!" I'll smack my fist down and turn to her, "I got it Sarah."  She swims over and locks it up.