St. Gertrude the Great's Prayer for the Holy Souls in Purgatory

Jesus dictated the following prayer to St. Gertrude the Great. He said it will release 1,000 souls from purgatory each time it is said:

Eternal Father, I offer Thee the Most Precious Blood of Thy Divine Son, Jesus, in union with the masses said throughout the world today, for all the holy souls in Purgatory, for sinners everywhere, for sinners in the universal church, those in my own home and within my family. Amen."

Number One Son and Number One Daughter are fascinated by this prayer. I wonder if they can commit it to memory? It is definately enpowering for little ones to know they can get holy souls to Heaven.