4 year old son: Look Mommy, the sun is going down.
8 year old daughter: **eye roll** This sun isn't going down [thinking to herself this kid is an idiot] the planet is rotating...
4 year old son: **looking at sister like she's lost her mind** Look Mommy, the sun is going down.
Me [in front]: **giggling**
8 year old daughter: **exasperated** The sun doesn't go down [you know she wants to say dammit here. You just know it.] the planet rotates!
4 year old son: Oh look, the moon is going up.