In her memoir “Story of a Soul,” St. Thérèse of Lisieux describes a dream she had at age 3 or 4. She explains demons fear a child!
I remember a dream I had at that age, which left a very deep impression: I was walking alone in the garden when suddenly I saw two horrible little devils near the arbor, dancing on a barrel of lime with amazing agility, in spite of having heavy irons on their feet. They looked at me with flaming eyes, then, as if overcome by fear, threw themselves in the twinkling of an eye to the bottom of the barrel. They escaped in some mysterious way and ran off to hide in the linen room, which opens onto the garden. When I saw how cowardly they were, I put my fears aside and went over to the window to see what they were up to. There the little wretches were, running round and round the table, and not knowing how to escape my gaze. From time to time they came nearer, still very agitated, to peep through the window; then, when they saw I was still there, they began racing about again in abject misery.
Keep your eyes on Jesus, who defeated evil. Ask for His protection. Prayer for shelter in His Sacred Heart. And remember the words of St. Thérèse.