A/N: Basically, fluff that I write to make myself feel better when the show abuses the characters too badly. This isn't entirely plotless, but it'll have a lot of random, happy and light chapters. Sorry if I update too quickly or too late.
Disclaimer: I don't own Supernatural.
The first time that John hears of his son's imaginary friend is just over a year after Mary's death. Maybe he'd have heard of him even sooner, if he had been listening more closely.
They're at yet another crappy motel room, and Sammy is playing with some toy cars under the table (not even Dean could get him to eat much that particular morning) while John's older son scarfs down a banana.
"Cas says bananas're good for ya," Dean says suddenly, looking up at his father and waving the half eaten fruit in the air. "He says they gots potatoes in 'em. Daddy, how do potatoes go inside bananas?"
John frowns, alarmed. "Who's Cas?"
"He's my bestest friend and really, really cool. Almost as cool as Batman. He's invisible when anyone 'xcept me's looking. How do potatoes go inside bananas?"
Oh, an invisible friend, then, John thinks with relief. Children are supposed to go through that stage. "I think you mean potassium, son."
"Oh. I'll tell Cas that. He can be real silly sometimes."
That night he hears his son voice behind him, explaining the difference between potatoes and "tassie 'em" to someone who is apparently standing right there.
"So potatoes are french fries, but 'tassie 'em is like medicine and they're what's good-"
John turns around tiredly and looks at Dean, who has stopped talking and is now looking at his dad with accusation.
"See now? You've made him imaginary again."
John chuckles and turns away again, but Dean doesn't resume his explanations.