Scrubbing the Floor

"Daddy," said Grace with a whine, as I was making dinner. "I want to do what Holden's doing!"
"What's Holden doing?" Probably something exciting, no?
"He's scrubbing the floor."
Which was true - he was scrubbing the floor with a sponge. So I offered another sponge to Grace and together the scrubbed the floor. I'm not sure what the moral of this story is.