The WIC for Kids Act amends the federal program that provides nutrition assistance to women, infants, and children by making it easier for more people to qualify and reducing paperwork burdens. The bill expands eligibility by automatically qualifying children whose family members receive Medicaid, child health insurance, Head Start, food assistance on tribal reservations, or nutrition programs in Puerto Rico and other territories. It also extends the certification period for children from one year to two years, meaning families won't need to reapply as frequently, and allows newborns born to participating pregnant women to be automatically enrolled without a separate application. Additionally, the bill permits state agencies to streamline recertification by checking existing benefit records rather than repeatedly requesting income documentation from families. These changes primarily affect low-income families with young children and are designed to simplify access to nutrition support while reducing administrative costs for state agencies running the program.