Thought about sticking a cartoon or a joke or a foreign word in the kids lunch every day. They'd open it up and it would be a few seconds of humor or thought. Maybe it would get passed around if it was good enough. Found a few X a day calendars which I'll use. Also bought a joke book but it's remarkable how few good jokes there are or maybe it's more like reading sheet music. For jokes to have their full power you have to encounter them as a performed thing. Just reading a book of jokes (unless you're a professional!) falls flat.