Few public schools in Massachusetts offer a sex-positive, inclusive sexuality education curriculum at the elementary school level. One Massachusetts public elementary school identified the need for such a program that addresses communication, sexuality, gender, and consent. The LETS! Teach, Affirm, Learn, Know (T.A.L.K.) curriculum was developed, literally from the "bottom up," with initial development and program approval focused on the kindergarten through second grades, through a town-gown collaboration between a university and its local public school district in 2018-2019. In this article, we describe the LETS! T.A.L.K. curriculum development and approval process, and present key research findings from our community-based process.