Play With Ideas
Artefact Cards are playing cards that help you play with ideas. They naturally make you do everything that you would do with normal playing cards - deal, shuffle, sort, rank, split, play - except because they're full of your ideas, it's like playing a game with everything that's whizzing around in your head.
They've been called everything from physical thinking tools to a table-top brain.
Use them on your own, with small teams or with larger groups.