The waiver must demonstrate that you will suffer extreme hardship if he can not return. The waiver can not be based on the children. If he has parents with either a green card or US citizenship, those may be used. Waivers are very complex paperwork, requiring a lot of work and lots of documentation. A small letter from you begging then to approve your husband will not cut it. If you have any medical issues, your medical record should be included in the waiver applications. The waiver must describe what would your life be like if you were alone in the US or if you lived with him in Mexico. The official reviewing his waiver application must be convince of your hardship. About 65% of the I-601 waivers are approved in Mexico. Those prepared by an attorney have higher approval rates than those prepared by "notorios". Good luck.
Answered on May 17th, 2011 at 10:43 AM