For a model with multiple records, show all the Children related

I’ve got a model of several parent records - say it is Accounts and there are 5 of them returned in my Account model.

Now I want to populate a 2nd model that shows all related Contacts to these 5 accounts.

How can I pass the Accounts (5 different IDs) in the Accounts model to be the condition on my Contacts model?

Choose the “IN” operator in your Contacts Model condition.

Doh!  I knew it was something easy.  Thanks!