One of Lucy's creative writing classes involves creating a literary magazine. In fact, I think the name of the class is actually "Literary Magazine" or Lit Mag for short. (<–That's cool & hip student jargon in case you were wondering.)
The title of this fledgling Lit Mag is The Invisible Cow.*
[*The Invisible Cow refers to cows that graze in the fields on the climb up to the Mauna Kea Observatories in Hawaii. It gets very foggy up there and the road is not lit at night. The cows in the surrounding pastures sometimes lay down on the warm pavement and BLAMMO! some unsuspecting driver invariably hits a poor cow, and then wonders, "Whoa! What did I just hit?"]
But that's not important right now.
Meanwhile back to the original story here; Lucy and The Invisible Cow Lit Mag.
To illustrate some of the articles, she was asking everyone she knew to draw a cow. Everyone she knew includes her parents.
The other parent is childlike, prone to silliness, and a bit whimsical.
(I know. Shut up.)