"Calm down" is a phrase that we all use, especially with kids when experiencing intense emotions. Here are some alternative phrases that just might yield better results, and an action plan to put them in place.
Why Saying "Calm Down" To Your Kids Doesn't Actually Work - The Mommy View
Heart braids. make a pony tail & tie w/ band, put hair back up through middle of pony tail, split hair into two sections, twist each section away from middle, bring together and tie with band - and it sits as a heart <3 (was easy to do one...took a little work to get the three connected, but it was cute when i finished.)