It is obligatory for every muslim person to pay Zakat al Fitr. It is a small amount (referred to as sa'a) and is equal to four handfuls or scoops of food. Each person whether young or old must have their Zakat al Fitr paid, before Eid prayer. It is acceptable for you to pay on behalf of those that are dependent on you such as young children. It is essential that each person is accounted for, even the child in the womb.
Zakat al Fitr Benefits
Zakat al Fitr cleanses the Muslim during Ramadan, feeds the needy, and demonstrates gratitude for the blessings provided. We send the money speedily to feed the hungry and provide Eid gifts to those less fortunate.
Ibn ’Abbas (RAA) narrated, "The Messenger of Allah (Peace be Upon Him) enjoined Zakat al Fitr on the one who fasts (i.e. fasted during the month of Ramadan) to purify from any indecent act or speech and for the purpose of providing food for the needy. It is accepted as Zakat (i.e. compulsory charity) for the person who pays it before the Eid prayer and it is Sadaqah (i.e. voluntary charity) for the person who pays it after the Eid prayer.’ (Abu Dawud)
To pay Zakat al Fitr simply increment the quantity per individual you are paying for.