Every summer (this year marks the 26th anniversary), Theatreworks USA presents one free Off Broadway show. The catch? Tickets go quickly and can only be obtained onsite one hour before curtain time. This year's production adds original songs to Rick Riordian's uber-popular The Lightning Thief, in which Percy Jackson, the 12-year-old son of the god Poseidon, must find out who stole Zeus' lightning bolt, all while dealing with his ADHD and dyslexia. Ages 8 to 12.