Let the little children come to me and do not hinder them, for to such belongs the kingdom of heaven. - Jesus
It is customary for the father of the household to bless children of all ages, either in the synagogue during Erev Shabbat (Friday evening) services or upon returning home for the Kiddush. Both hands are laid on the head of the child to symbolize a blessing imparted with complete generosity of spirit.
The blessing prescribed by tradition invokes the names of Joseph's sons (according to Genesis 48:20) and the names of the matriarchs, and includes the priestly blessing. Parents may use this intimate moment as a chance to add their own words of blessing and offer expressions of love and appreciation to their children. You may wish to bless all your children together or bless each child individually or privately.