Kabayan,

Here is the documents required to obtain visa for new born baby:

1.) Application which you can get in the portabin outside the immigration.
2.) Colored passport pic any background will do except white.
3.) Original Passport of your baby.
4.) Passport copy, ID & RP and Marriage certificate copy of HUSBAND & WIFE.
5.) Birth certificate copy. Both the white & yellow.

If you got the approval immediately then be thankful because once I've applied for my baby and they did not give me the approval unless I'll transfer my wife sponsorship.

NOTE: Make sure you process this before 2 months starting from the birth of your baby or else you'll be fine 10QR per day.

All the best and Good luck.