Our four year old sometimes gets pretty upset and then aggressive. Part of it may be because she still trying to figure out how to differentiate emotions and to figure out proper responses to them.
To help her, I created this charade game with two dice:
One of the dice has emotions on it and the other one animals.
So, depending on your throw, you have to mime an animal with an emotion, e.g. a tired cow or an excited horse or a sad cat.
That way, there are 36 possibilities, all of which are non-threatening, since you are acting a moody animal.
This gives ample options to discuss emotions. And it's fun, too.
"Nature never says one thing and wisdom another."
Decimus Junius Juvenalis