Translation:What kind of a present shall we buy for my mother's birthday?
Can someone explain the structure of annemin doğum günü? If doğum günü is birthday, with the -ü marking it out as a compound noun, then shouldn't there also be a possessive marker to go with the possessive case of annemin? So 'annemin doğum günüsü'? Otherwise isn't the possessive of annemin just sort of left hanging?