Inadequate sleep occurs in 25% of our nation’s children; poor sleep is associated with physical, cognitive, and social consequences. Developing good sleep hygiene in middle childhood is important, because habits typically extend to adolescence and adulthood; yet, there has been little research on sleep interventions for school-age children. The purpose of this study was to determine the feasibility of a developmentally tailored, motivation-based intervention (MBI) focused on improving sleep behaviors in school-age children aged 8–11. Nine parent–child dyads participated in an 8-week protocol utilizing MBI and comparisons of objective (actigraphy) and subjective (sleep diaries) data. Results suggest that parent and children are able to identify a target behavior to change and complete the protocol. Further, preliminary evidence indicates that sleep patterns change using MBI. Future research will be directed toward comparative effectiveness testing and exploring ways in which it can be adapted and incorporated into school nursing practice.