Du'a for children's complete relief

اللَّهُمَّ لَا تَدَعْ لَهُمْ ذَنْبًا إِلَّا غَفَرْتَهُ، وَلَا هَمًّا إِلَّا فَرَّجْتَهُ، وَلَا دَيْنًا إِلَّا قَضَيْتَهُ، وَلَا حَاجَةً مِنْ حَوَائِجِ الدُّنْيَا وَالْآخِرَةِ إِلَّا قَضَيْتَهَا يَا أَرْحَمَ الرَّاحِمِينَ

Allahumma la tada' lahum dhanban illa ghafartah, wa la hamman illa farrajtah, wa la daynan illa qadaytah, wa la hajatan min hawa'ijid-dunya wal-akhirati illa qadaytaha ya arhamar-rahimin

O Allah, do not leave for them a sin except that You forgive it, nor a sorrow except that You relieve it, nor a debt except that You settle it, nor a need from the needs of this world and the Hereafter except that You fulfill it, O Most Merciful of the merciful.

Adapted into the plural for children from Sunan al-Tirmidhī 3222.