So my kids are playing Cards, the Universe, and Everything, often on their phones in the back seat of the car. The cards draw from history, natural history, and folklore. This produces amazing mashup decks, some of which would be incredible prompts for speculative fiction writing. For instance:
On the way to shul this morning one of them was playing with Great Yu, Wyatt Earp, Josephine Baker, the Egyptian Book of the Dead, and Cherenkov radiation. The other one had Voltaire, Zhang Guolao, a giant clam, a disco ball, and film noir. The possibilities are genuinely endless.