For children and young people
Keep Your Head has a list of resources for children and young people.
For everyone
Keep Your Head has lots of information about managing mental health and wellbeing, talking to children about coronavirus, guidance for carers and self-help.
The Mental Health Foundation are part of the national mental health response providing support to address the mental health and psychosocial aspects of the Coronavirus outbreak. They have information from being isolated, to talking to your children about coronavirus, and everything inbetween.