HAPPENIN’ OTSEGO for THURSDAY, DECEMBER 29 Kids Christmas Science Workshop CHRISTMAS SCIENCE—1 p.m. Bring the kids to enjoy a morning of holiday break fun featuring a workshop to make Santa’s Magic Milk and Exploding Cookie Cutters. Springfield Library, 129 County Road 29A, Springfield Center. (315) 858-5802 or visit http://libraries.4cls.org/springfield/ BLOOD DRIVE—Noon to 5 p.m. Save up to three lives with the American Red Cross. Clark Sports Center, Cooperstown. Register at redcrossblood.org…