Mr. McGroovy's Box Rivets (I know - don't you love it?) has a step by step tutorial on how to convert refrigerator boxes into a kickass cardboard castle. The first thing I thought upon seeing ...

said 9-year-old McCoy McSwain, looking over the cardboard box creation. "Since it's made of only cardboard, it took a few hours to make it." It was a cardboard box castle.

In July 2010, BYU students broke the world record for the largest water balloon fight. This week they went for another new world record, this time to build the largest castle - out of cardboard boxes.

Camp organizers say the kids agreed on what they were going to build pretty quickly. Mae Smyth said, "Cardboard. Bunch of cardboard boxes. Then in the end, everyone came together with this one idea." ...