Evelyn the artist

So it's 9:45 pm. Evelyn who was put to bed at 8:00 pm comes out of her room and asks Nathaniel
"Can you read me a book Daddy?"
Nathaniel rolls his eyes and smiles
"Okay Evelyn just one book, then you need to go to sleep."
They walk hand in hand to her bedroom. Silence.
Then from the room I hear,
"Stacey, will you come here for a moment?"
I get up from the sewing machine (new hobby) and find Nathaniel and Evelyn staring at little finger marks all over the wall above her bed.
Nathaniel wipes the creamy fingermarks off the wall and asks
"Do you know what this is, Stacey?"
I shake my head unable to think of anything in the room that's creamy like that.
Evelyn happy to help her mommy and daddy figure out this creamy mystery states,
"I know what it is. It's butt paste!"