When I came home from my guild meeting the other night, I found that DH had gone into the basement and pulled out his old box of computer punch cards from back in the dark ages for the Things to play with. Every now and then the punch cards come out and the house of cards building begins. Here is the castle they made that night:
It didn't take long before they decided to knock it down. Over the next few days, they do this over and over, until I get tired of it and put the punch cards away!