John Kostickâ€™s Foldable Stars (1965) began as models of mathematical concepts, particularly the structural-relationship principle known as tensegrity (or tensional integrity). â€œThe abstract lines that define geometric forms are indicated by actual physical parts that interact synergetically,â€ says the designer. â€œThus symmetry and structural integrity are the results of the assemblage of simple linear components, tension and compression, push and pull.â€ Kostick refers to his Stars as â€œmathematical truths that you can hold in your hand,â€ and after you pick one up, youâ€™ll have a hard time putting it down. They can be hung or placed on display, but they invite interaction, and they are fun to play with. Handcrafted in Massachusetts, these multi-axis Foldable Stars are made of bronze that will patina beautifully over time. Kostick was granted a patent for his Stars in 1970. Made in U.S.A. Set includes one of each size. John Kostick: Foldable Star Sculptures.