Child: "There's a text message on your phone. 'Ultimate Frisbee at the stadium tonight at 6 pm.'"
Me: "That was from yesterday."
Child: "Oh, okay. Are you going?"
Child's defense was that she had just gotten back from a 9.5 mile run, so I can't really blame her. And the Frisbee will have had been fun, after I invent my time travel device.