Some mornings we just want to hide under the bedclothes, and it is no different for children
Building a den, or a fort, or a spaceship to be in can be a great help if children are worried or stressed.
And anyway, it is a fun way to develop planning and action skills, and end up with a place where it is nice to be cosy and have stories or play
It can be inside or outside, big or small. Your child might want to make it themselves, or for you to help (or do most of the work …). You might help them find materials like boxes, sheets, branches, etc
And think how to decorate it and make it a good place to be. Older children can help too to make it a family space, or everyone might want their own.