Thank you for your important question. You can learn more about logic models by consulting Chapter 2, Section 1 of the Community Tool Box, "Developing a Logic Model or Theory of Change." (This can be accessed by clicking ?Tools? on our home page, and then ?Table of Contents.?) You may also wish to consult several of the other sections in Chapters 1 and 2 on different types of models, perhaps especially Chapter 1, Section 5, which discusses an evaluation model we use ourselves. We believe that logic models are valuable; at the same time, they are not cast in stone, so it may be perfectly acceptable to adapt the details of the model to meet the needs and demands of your particular situation. Ultimately, your colleagues and participants in the healthy children's program will need both to support and to help implement the model if it is to be successful. Thank you again for writing to us at the Community Tool Box; and all best wishes for success in developing a network of children's centers whose success will exceed even your own expectations.