This Game is meant for Cub Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

5 or more scouts

The group sits all facing the front.
One scout stands in front of the group, facing the group - he is the Chooser.
Another scout stands next to the Chooser and he is the Captain, but facing away from the group.

To play, the Chooser points to a scout who is the Speaker. The Speaker says, "Good Morning, Captain!" in a disguised voice. The Captain guesses who said it. If he is right, he continues as Captain. If he is incorrect, the scout repeats, "I said, Good Morning, Captain!". If the Captain fails a second time, he returns to the group, the Chooser is the new Captain, and the Speaker is the new Chooser.

You may prefer to only give a Captain one chance, especially if you have a smaller group.