Have the angel reading the story from the Bible.
Pick one of your children's bible story books for the angel to be reading.
Write a quick note from the angel to your child.
Print a coloring page or find one in a coloring book for the angel to leave about your story for the day.
If life happens as it can often do and you don't read the bible story for the evening, don't move the angel. Then tell your children that the angel can't move until you have read the story he/she brought for you to read.