''Coppelia'' a ballet in three acts, presented by The Alabama Youth Ballet, along with The Stevan Grebel Center for Dance. A charming and humerous story about a dollmaker, ''old'' Dr. Coppelius, and his doll, Coppelia, and the village teens who play a trick on him only to find that they are tricked too. Music by Delibes, with choreography by Stevan Grebel, world renowned teacher and choreographer.