How my kids become us citizen?

Question

I am us citizen.which form we need.

Answer 1

check with the INS.  They should have all the appropriate paperwork.

Answer 2

You don't tell us where you are living, or where the children were born.

If they were born outside of the US, go contact the US embassy in the country where there were born, and get a 'certificate of birth abroad'

You'll need (at the least, and probably more than these) your children's birth certificates, your birth/citizenship certificates, and anything the consulate asks for.  You can use the Certificate of birth abroad just like a US birth certificate, to get your children passports and prove their citizenship.