"NanoDays is a nationwide festival of educational programs about nanoscale science and engineering and its potential impact on the future. NanoDays events are organized by participants in the Nanoscale Informal Science Education Network (and take place at over 200 science museums, research centers, and universities across the country from Puerto Rico to Hawaii) The Tech Museum of Innovation will celebrate nanotechnology. Every day of NanoWeek, explore nanoscience with wonderful hands-on programs." - http://www.thetech.org
This event is free with admissions.