Is it permissible for parents to spend the money granted to their children, whether it is in the form of cash or physical assets?
It is permissible when necessary, provided that there is no harm to the children, as the Prophet (peace be upon him) said,
The most pleasant of what you eat is that out of what you earn; and your children are from your earnings.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.