New parents are thrilled when people show an interest in their baby.
Capitalize on this by taking a picture of each new baby in the nursery.
Give the picture to the parents in an envelope with a note: "It was a pleasure to have your baby in our nursery. Do hurry back to worship with us again soon. We provide nursery facilities for infants and children up to three years of age during all our services. We invite you to leave your children with us."