Another idea was transalting gamecards for a construction game into sculptures and reliefs - translating the image what to build into an haptic senseable object. Construction was of course rather easy, but both versions didn't work well in real life: The sculptures broke easily, and the reliefs were hard to read, since details where to small. Of course, by printing them bigger you can circumvent these issues, but then you need a very big box for the cards. Design files for OpenScad can be found here.