Pray the Sign of the Cross together. Ask the children to call on the Holy Spirit to help them recall times when they turned from God. Invite them to express their sorrow by praying together the Act of Contrition:
My God, I am sorry for my sins with all my heart. In choosing to do wrong and failing to do good, I have sinned against you whom I should love above all things. I firmly intend, with your help, to do penance, to sin no more, and to avoid whatever leads me to sin. Our Savior Jesus Christ suffered and died for us. In his name, my God, have mercy.