Lifeway Resources, the educational publisher of the S. Baptist Convention, puts out some pretty good stuff even for Presbyterians like me. 
Read their "6 Considerations for Re-opening Your Kids Ministry"
One thing this resource doesn't address is how we can reach out to those who DO NOT initially heed the call to return. I suspect many parents will be from Missouri on this issue, i.e. "show me what you're doing and how many others think it's safe." In this respect, we should be ready to post photos and videos of early gatherings (making sure they show good social practices).
On a related subject, I found this very interesting blog asking "24 Questions Your Church Should Be Asking Before People Return." Some of them pertain to children's ministry as well.
