Observing, Ashlyn asked, "Is there an exercise that makes you stay awake?"
Me: Actually, all kinds of exercise make you feel more awake because they make your heart beat faster and your blood flow all through your body.
Ashlyn: I know what my heart is for.
Me: You do? What, Ashie?
Ashlyn: To wake me up.
Ashlyn: My heartbeat is like a lightning storm inside my body. Boom, boom, flash, boom!