Shrink art, Shrinky Dinks, or Shrinkles is a toy and activity kit consisting of sheets of polystyrene which can be cut with standard household scissors.

[1] Shrinky Dinks were invented in 1973 by Betty Morris and Kate Bloomberg, two housewives in Brookfield, Wisconsin, as a Cub Scout project with their sons.

However, oily or waxy substances (such as cheap colored pencils,[clarification needed] crayons or oil paint) are not suitable because they melt or burn in high heat.

[6] In 2008, University of California, Irvine Professor Michelle Khine applied Shrinky Dinks to create tiny structures for the application of microfluidics to topics such as stem cell research.

[11] In 1992, the California rock band Sugar Ray formed with the name "Shrinky Dinx", but later changed it upon threat of lawsuit from the Milton Bradley Company.