This excellent set of tools from @ Psychology Tools Limited gives the whole family ways to deal with the understandable worries and anxieties surrounding the Covid-19 situation.
It even has visual suggestions such as the worry tree which are suitable for children to use and explore and understand how they are feeling.
If as parents we are concerned for how are children are feeling, we should also take a look at how best we can manage our own fears so we do not pass these on to our children and their siblings.