Filing - Two Petitions are Required
You must first file an immigrant Petition for Alien Relative, form I-130 for your spouse with the USCIS Office that serves the area where you live. The USCIS will send you a Notice of Action (Form I-797) receipt notice. This notice tells you that the USCIS has received the petition.
You next file Petition for Alien Fiancé(e), form I-129F for your spouse and children. Send the I-129F petition, supporting documents and a copy of the Form I-797 receipt notice to this Department of Homeland Security USCIS Address on their web site.
Good luck and this is all you need to do until the AOS since the children have Derivative Status. I got this information from
http://travel.state.gov/visa/immigrants/ty...s_1315.html#10cMary