The University of Miami and the Miami Science Museum hold "DNA Day," a day of hands-on activities to discover what DNA is and what it looks like. 10 a.m.-5 p.m. Miami Science Museum, 3280 S Miami Ave., South Miami. Free with paid admission. Free admission for MiaSci members and children under 3. $10.95 students, seniors and children 3-12. $14.95 others. Details: (305) 646-4200 or www.miasci.org.