To schedule your appointment, visit our car seat signup or call 414-329-5275. Walk-in appointments are available, but not guaranteed. The Greenfield Health Department has car seats for all ages available for purchase if your child or children are in need of one. Car seat styles include: infant, convertible and high-back booster. We do not have the booster-only seat style in stock. Car seats are only available to participants of the Women, Infants and Children (WIC) program, FoodShare recipients or by consultation. The cost of a car seat is $20.00. Please indicate when scheduling if you will need to purchase one for your appointment.