Requirements for applying Visa for children:-
1, copy of personal id or passport of the resident husband
2, Letter from Father employer citing profession and salary
3, copy of attested children birth certificate
4, copy of children valid passport (Copy of sponson's wife passport with valid residence permit or residential tenancy contract)
For attestation & translation please contact sheen services as they are the best in Qatar who is very flexible, reliable with competitive price.http://sheenservices.com/contact-us.html- ph-44366147/55974495