This took a few minutes to figure out.
Basically you are making a standard timed announcement…but FIRST you need to set the Do Not Disturb flag to the Amazon Echo device (or devices) that you want to ignore.
In this example, I want to set up a bedtime alert for each kid. Before 10pm it’s perfectly fine to make an announcement on every device, but once 10pm rolls around, I want to make sure that my wife’s sleep isn’t disrupted in the bedroom. This means removing our Echo from the Announce listing…except that it’s not really an option.
So first, I set the Do Not Disturb flag for the Amazon FireStick TV and Amazon Echo that are in the master bedroom for a duration of 1 minute.
Then I have it play the required announcement. Confirmed, nothing plays in the master bedroom for 1 minute.
Once the 1 minute is up…I can send any required notifications to all devices as normal.