Pass us citizenship to kids overseas

It appears that you have the necessary residence in the US (five years with at least two of which were after the age of 14) to transmit US citizenship to your legitimate children. You should make an application to the consulate or embassy on form DS-2029 Application for Consular Report of Birth Abroad of a US citizen child. For your wife, you would have to file an I-130 relative petition for her, have that approved, and she would ultimately interview for an immigrant visa at the American consulate or embassy having jurisdiction in the home country to issue immigrant visas. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.

You need to complete the registration of child born abroad and request passport for your children. For your wife, you need to complete an I-130 petition and once that is approved, form DS-260 so that she can immigrate to the US. There special requirements in these case it is better to get legal counsel. You will need to show you have sufficient income to sustain your family, among others. 

Your children may already be US citizens. You should file a Consulate record of birth abroad (CRBA) with the US Embassy in the country of your children's birth. They should be able to document that they are already citizens by birth and provide a record of that for you. As far as your wife is concerned, you would need to sponsor her for a green card. You should retain counsel to handle the case from start to finish so that no mistakes delays or denials result.