The Power Play! Campaign's School Idea & Resource Kits improve determinants of fruit and vegetable intake and physical activity among fourth- and fifth-grade children.

Objective: Examine the effect of the California Children's Power Play! Campaign's School Idea & Resource Kits for fourth/fifth grades on the psychosocial determinants of fruit and vegetable (FV) intake and physical activity (PA).

Methods: Randomized, controlled trial (n = 31 low-resource public schools; 1,154 children). Ten grade-specific, 50-minute nutrition and PA lessons over an 8-week period.