Kids Immune Support Gummies Formulated With Vitamin C, Zinc, & Elderberry. Supporting your child's immune system is important, and these organic, mixed-berry-flavored gummies are a delicious way to do so! Tasty USDA Organic vitamin C, zinc, and elderberry gummies made to support children's immunity! Vitamin C and zinc are both antioxidants that help to support a healthy immune system. Vitamin C's antioxidant properties limit the damage done by free radicals to help maintain immune health.