Thank goodness for the Calming Caddy! Inside, there are things like stress balls, books about feelings, etc.
When I was out yesterday one of my girls had a breakdown. This happened before when I was out and the social worker had to get her. Since then I have trained her to go to a quiet area of my classroom. While in the midst of the breakdown, she was sent to the caddy (actually a cute box from the dollar store). She soothed herself. It's great for kids with emotional issues.