Pacific Science Center is an independent, non-profit science center in Seattle, Washington with a mission to ignite curiosity and fuel a passion for discovery, experimentation, and critical thinking. Pacific Science Center serves more than 1 million people each year at its campus adjacent to Seattle Center, at the Mercer Slough Environmental Education Center in Bellevue, Washington, and in communities and classrooms across the state of Washington.

More details: https://en.wikipedia.org/wiki/Pacific_Science_Center