My favorite thing to teach in creative writing classes is show vs. tell for emotions. This always leads to a really fun game of emotion charades. For this writing prompt, you can use a friend, your kids, or yourself with a mirror. Pick four or five emotions and list all of the body language traits associated with those emotions. Watch your friends/kids mimic emotions while you guess what they are feeling.
Example - angry. Their eyebrows form a deep V, they narrow their eyes, they clench their teeth or their fists, they stomp.
Next time you write, instead of saying someone was angry, use these descriptions to depict their emotions.