Buzz like a bee to help calm down. This strategy is taken from GoNoodle. 
To do bee breaths, first, stick your index fingers in your ears and close your eyes.
Then, take a slow breath in.
Next, breathe out through your nose while humming/buzzing.
Repeat these steps a few times.

​If you'd like to do it with the video, you can access it on GoNoodle or here.

This is a super simple calm down strategy!

First, take a break.

Next, slowly count to 10. You can use your fingers to help your or you can just count.

When you are finished, stop to see how you are feeling. If you feel better, you can get up and return to your activities. If you do not feel better yet, you can try counting to 10 again or try a new skill. Or, if you are ready, you can talk to an adult about how you feel.

This is another fun way to calm down! Your child traces the maze with his finger and breathes in and out according to the symbols on the maze. These are very relaxing and great for adults, too!

Can be purchased here.

Another breathing strategy to help your child calm down when upset, this one is derived from the book Breathe Like a Bear by Kira Willey. 

Pretend you are holding a candle. 

Take a long, slow breath in.

Next, slowly blow the air out toward your candle, but don't blow it out! Just make the flame wiggle a little.

Keep taking long breaths in and slow breaths out for a few more times or however long you feel like.

Finally, on your last breath out, blow out your candle!