The Carnegie Science Center has received its largest gift, a $7.5 million donation from PPG and its corporate foundation for the interactive museum in Pittsburgh.

The gift is part of more than $42.5 million being spent on a new 37,000-square-foot wing that will be known as the PPG Science Pavilion for at least 20 years.

Ann Metzger, who co-directs the science center, says the new wing will enable the museum to host "" exhibits the center is now too small to accommodate.

The 36-year-old science center also hopes to create new science, technology, engineering and math—or STEM—programs with the .