Must household members [daughter; wife; Sefaradi boys] who are fulfilling the Mitzvah with the father of the house be present at the time of the blessing?
It is preferable for all the household members to be present at the time of the lighting and blessings. If a household member was not present, he/she nevertheless fulfills his/her obligation. The person is not to recite Sheasa Nissim upon seeing the Menorah despite the fact that he/she was not present when the blessing was recited.
 The reason: As some Poskim hold that they do not fulfill the blessing of Sheasa Nissim with the household lighting unless they are present and hear the blessings. [Michaber 677:3 as explained in M”B 677:14 [contradicts 676:3]; Mordechai; Biur Hagr”a in name of Rashi; Elya Raba; Bach; Peri Chadash; brought in M”B ibid; Shaar Hatziyon 676:9] Likewise, today that we light inside, it is important to have as many household members by the lighting as is possible in order to publicize the miracle. [See Rama 672:2; M”B 672:10]
 Michaber 676:3 [contradicts 677:3]; M”A 676:1; Taz 676:4; Birkeiy Yosef 676:3; M”B 676:6; 677:14; Kaf Hachaim 676:24; 677:23; Piskeiy Teshuvos 675:3; In Rishonim: Rashba; Ran; Smag
Other opinions: Some Poskim rule the blessing of Sheasa Nissim and Shehechiyanu is to be recited by the household members upon seeing the candles. [Michaber 677:3 as explained in M”B 677:14 [contradicts 676:3]; Mordechai; Biur Hagr”a in name of Rashi; Elya Raba ; Bach; Peri Chadash; brought in M”B ibid; Shaar Hatziyon 676:9] Practically, the blessing is not to be recited as Safek Brachos Lihakel. [M”B 676:6; 677:14; Kaf Hachaim 676:24; 677:23] However, some Poskim rule that the blessing of Sheasa Nissim is to be recited by one who was not present at that time. [Ashel Avraham Tinyana 675 “even a girl over Chinuch who did not hear the blessing must say it upon seeing the candles.”]