1.   Borrowing plans from the original, universities in Canada, Mexico and across United States have built sculptures.

2.   Clay Ketter, included in the Philadelphia show, builds sculpture with shelving and kitchen cabinets that he buys at Ikea.

3.   Inspired by Islamic calligraphy, Haiderzad builds sculptures of swirling Farsi letters and dots.

4.   Protesting French nuclear testing in the South Pacific, activists on Wednesday built a sculpture of a mushroom-shaped radioactive cloud outside the Stockholm office of Air France.