Today is the feast day of Our Lady of the Miraculous Medal. On the 27th November 1830, in Rue du Bac in Paris, Our Lady asked St Catherine Laboure, a nun living in the spiritual tradition of St Vincent de Paul, to strike a holy medal. Our Lady herself told her how the medal had to be. More details about the apparitions and medal can be found here.
I always have a stock of these medals to give out to patients at the hospital, children, families and when I visit. This is a great devotion showing filial love towards our heavenly Mother and following her own request. I recommend it. One can acquire medals from here.