Infocom games, text adventures of the olden days, came with not just floppy disks containing the software, but trinkets, papers, and other items that relate, somehow, to the game. This might include an issue of a fictional magazine that's present in the game, inside of which might be clues (or copy protection material used in the game), or coins, or maps, or stock certificates, or magic stones, or pocket fluff, or more. Somehow, sometime, these game-included toys earned the collective label, "feelies."

Feelies.org wants to encourage the production of feelies for new games by offering their production and sales services. It's a fascinating idea, and is begging me to write a text adventure just so I can invent and distribute little toys to enhance the gameplay experience.