The Anna Freud Centre has a great amount of resources including a pack full of activities to help children navigate through this peculiar time. Below is an example of one of their activities, the emotion wheel, which is used as a communication tool for children that may struggle to get across how they are feeling.
 

This document offers advice to professionals working with children during the pandemic - https://www.annafreud.org/media/11247/option-3-covid-advice-professionals.pdf

Below is a really helpful booklet to help all staff working with children with how best to support them.