The Robert Wood Johnson Foundation (RWJF) seeks to identify and promote high-value, high-impact policy changes that can help low-income families support the healthy development of their young children. The goal of this agenda is to generate evidence to guide decision-making about policy changes that can better support families with young children. Research supported by this call will address gaps and limitations in SNAP, WIC, and Child and Adult Care Food Programs (CACFP), three federal programs that are instrumental in reducing food insecurity and increasing nutritional adequacy in children from vulnerable and disadvantaged backgrounds. The purpose of this grant is to test the feasibility and efficacy of one retail strategy know as bundling to increase participant satisfaction with the WIC shopping experience, lower average WIC voucher redemption costs, and increase total WIC customer purchasing at participating stores.