10 a.m. – The Bio Bus brings chemistry and “states of matter” to the library. Discuss dry ice, plasma, solids and liquids. Presented by Georgia State University. Free, and open to all. For ages 6-12. Parents welcome. Additional sessions, 11 a.m., 1 and 2 p.m. Limited to 20 participants each. Registration required, and started June 18. Call 770-512-4640 or visit the Dunwoody Branch Library to register. 5339 Chamblee-Dunwoody Rd., Dunwoody, 30338.