Your little ones have been introduced to the zones and are working to identify how they feel throughout the day to better understand themselves and to help them to regulate their emotions/behavior. Below you wil find more information to explain the Zones taken right from: http://www.zonesofregulation.com/learn-more-about-the-zones.html
Self-regulation is something everyone continually works on whether or not we are cognizant of it. We all encounter trying circumstances that test our limits from time to time. If we are able to recognize when we are becoming less regulated, we are able to do something about it to manage our feelings and get ourselves to a healthy place. This comes naturally for some, but for others it is a skill that needs to be taught and practiced. This is the goal of The Zones of Regulation (or Zones for short).
What are the Zones?
By addressing underlying deficits in emotional and sensory regulation, executive functioning, and social cognition, the framework is designed to help move students toward independent regulation. The Zones of Regulation incorporates Social Thinking® concepts and numerous visuals to teach students to identify their feelings/level of alertness, understand how their behavior impacts those around them, and learn what tools they can use to manage their feelings and states.
The Four ZONES:
The Yellow Zone is used to describe a person who may be experiencing stress, frustration, anxiety, excitement, silliness, the wiggles, or nervousness when in the Yellow Zone.
The Green Zone is used to describe a person who may be described as happy, focused, content, or ready to learn when in the Green Zone. This is the zone where optimal learning occurs.
The Blue Zone is used to describe a person who may feel sad, tired, sick, or bored.
The Zones can be compared to traffic signs. When given a green light or in the Green Zone, one is “good to go”. A yellow sign means be aware or take caution, which applies to the Yellow Zone. A red light or stop sign means stop, and when one is the Red Zone this often is the case. The Blue Zone can be compared to the rest area signs where one goes to rest or re-energize. All of the zones are natural to experience, but the framework focuses on teaching students how to recognize and manage their Zone based on the environment and its demands and the people around them. For example, when playing on the playground or in an active/competitive game, students are often experiencing a heightened internal state such as silliness or excitement and are in the Yellow Zone, but it may not need to be managed. However, if the environment is changed to the library where there are different expectations than the playground, students may still be in the Yellow Zone but have to manage it differently so their behavior meets the expectations of the library setting.