parents/sibling?

[uscis1 1]

I am a US Citizen. The question I have is that when I petition for parents, do the my sibling under 21 qualify or not?

[NigeriaorBust 4,087]

No they do not. You can file a sibling petition but the wait is 12 years or so.

[uscis1 1]

what would be the best solution? Should the father come first and than petition for the whole family on Green Card? One kid is under 16 and the other two are over 21.

[PK and PK 13]

I am a US Citizen. The question I have is that when I petition for parents, do the my sibling under 21 qualify or not?

Yes you can petition your siblings but it will take much longer (like 15 years) under F4 visa. Or if your parents become green card holders, they can petition under F2B visa which takes around 9 years (plus the time for your parents petition.)

[PK and PK 13]

I am a US Citizen. The question I have is that when I petition for parents, do the my sibling under 21 qualify or not?

This will allow one parent to be with the siblings all the time but will not speed up the process. You can also have multiple petitions ongoing (first your petition your siblings and then your parent once they arrive) if you are willing to spend the money. Look at the linked Visa bulleten and the various preference categories and their processing delay (priority dates.) http://travel.state.gov/content/visas/english/law-and-policy/bulletin/2015/visa-bulletin-for-april-2015.html