Tilly loved to imagine, but sometimes she would have a spooky imagining, and that made it hard to fall asleep. 

“Mom? I think there are monsters in my room? What do I do?”

“What a wonderful imagination you have, Tilly,” said her Mom, as Tilly climbed into bed. "When that happens and you feel scared, you can call Aunt Agnes.”

“Call Aunt Agnes?” said Tilly. “Who is Aunt Agnes?”