 By the 1960s, Simons became internationally recognized as an artist, showing her work in San Antonio, Houston, Mexico City, San Francisco, and New York, and later showed her work in Brazil, Venezuela, and Australia.Several of her pieces drew from her expertise as a balloonist and engineer.In 1971, she exhibited her work at the Stedelijk Museum in Amsterdam, Holland, and the museum commissioned her to fly a gas balloon launched from the museum's grounds, a project she called "Drift Amsterdam".