Saturday, May 6: Free Comic Book Day.  All ages are welcome at the Kailua-Kona Public Library to receive two free comic books while supplies last. A Cosplay Competition is open to 4th to 12th graders, with registration from 10 to 10:30 a.m.; the competition with audience participation will be held from 10:30 to 11 a.m. The cosplay can be from any source and original characters are welcome. Two winners will each receive a $25 Regal Movie Theater gift card. Young…