Give your sweetheart a special gift – learn basic glass blowing theory to produce brilliantly colorful glass flowers and hearts.  No experience necessary to take this Boston Center for Adult Education class on Sunday, February 12 from 2 – 6, taught by the instructors at the Diablo Glass School.  The $145 session will take place at Diablo Glass and Metal, 123 Terrace Street in Roxbury.  To sign up, visit www.bcae.org.  The antique glass flower bouquet pictured below was a gift to Elizabeth C. Ware and her daughter Mary Lee Ware from Leopold Blaschka in 1889.  Photograph by Hillel Burger, copyright President and Fellows of Harvard College.