Camp Half Blood Atlanta at the Little Shop of Stories, Decatur, Ga., convened this week. Based on Rick Riordan's series Percy Jackson and the Olympians, the camp has 32 campers who will be introduced to all things Greek, including myths, language instruction, history, warrior training, astronomy, art and music. The first day featured a visit by Julia Prettie from Emory University, who led the group in an improvisation exercise of Heracles and his Twelve Labors. Cabins of Athena, Apollo, Ares, Hermes and Demeter also compete against each other in daily Capture the Flag games.