Is it permissible to dispose of the father's possessions that he collects from the street (such as wooden cages and gravel) without his knowledge, for the purpose of tidying the house, knowing that he will not be upset?

The children should discuss with their father their need to dispose of items he owns that cause them harm or constrict their living space. If the father agrees, then the objective is achieved. If he refuses, it is not permissible to dispose of them without his consent, as they are his property. If these items constrict the living space and prevent its proper use, the children can ask their father to dispose of them or provide suitable housing.