Latest Attempt (July 2007)

Made a very weak tower model out of paper, with similar design to the WTC towers, with ceramic weights on each floor.

Lower floors had more plies of paper than upper floors.

The tower was unstable and tipped over as one side of the base gave way. The upper part of the tower remained basically intact after falling.

Conclusion-- lower floors have to be VERY strong and stable to support the upper weight of the tower.