contact ASTC (Association of Science and Technology Centers) in Washington, DC, 1025 Vermont Ave NW, Suite 500, Washington, D.C. 20005 They have over 450 member science centers around the world. They do have an excellent directory as well as other publications, an annual conference and even a workshop on starting a science museum. Phone number is 202-783-7200. their e-mail address is [log in to unmask] Also, the Association of YOuth Museums is not totally science focused but many of their member children's museums do some science or even all science. Their address is AYM, 1775 K St. NW Suite 595 Washington, DC 2006. Phone 202-466-4144. Their e-mail is [log in to unmask]