If you have children under 18 accompanying you to Sweden you can apply for a residence permit for them in your online application.
Children under age will need:
The documents required for all applicants (see the page Required documents)
The international birth or kinship certificate.
The judgement of divorce (proof of custody), verified with apostille at the municipal court, and translated to Swedish or English by the official interpreter
Written consent of the child’s other parent / custodian, signed in person at the Embassy.