Enfamil Poly-Vi-Sol Multivitamin Supplement Drops with Iron for Infants and Toddlers,there are times when your child's diet may not be giving him everything he needs. Enfamil Poly-Vi-Sol with iron is the ideal vitamin supplement, provides additional nutrients during growth spurts, transition to solid foods and for picky eaters. An excellent source of essential vitamins, provides supplemental iron for psychomotor and mental development in infants and children.