Clarence Thunder may not be as young as he once was . . .But is he as good once as he ever was? He hopes so. He's been watching Tammy Tall Trees, the young single mother who works next door in the Child Care Center. He wants to show Tammy he can take care of her and her young son-but can he compete with the boy's real father?Tammy was crushed when her old boyfriend abandoned her after she got pregnant. Since then, she's put her son first-which means...