One of the simplest ways to implement such actions are finger puppets. Kids will love them, just because of their simplicity.
When I saw an idea from the page Spoonful.com, where they made finger puppets from rubber gloves, I finally found a way to recycle all those accumulated left gloves (as right-handed, my right glove is always faster torn out). And every crafter knows how nothing should be thrown away.
We used a regular pen to draw faces expressing different feelings, but you can also use waterproof markers. This is also a great way to explain the feelings and associated facial expressions to children.
Let the play begin!