Emotion regulation is a central feature in human emotional development. However, measures based on children's observable emotion regulation behaviors are largely absent. An inventory of children's emotion regulation strategies was developed from current measures and four focus group discussions with experts in child behavior and emotion. From there, a 103-item inventory of observable emotion regulation strategies was developed. Multidimensional scaling was used to elicit and analyze similarity data, generated by participants with lay and expert knowledge in children's emotion regulation engaging in a series of objective sorting tasks. This created a type of "collective working model" which reflects the internal structure of the item collection. The resulting framework provides a model that overlays current theoretical models, allows these models to be discussed and expanded, and the resultant Children's Emotion Regulation Inventory (ChERI) carries potential usefulness for research or clinical applications.