Her plan was that if she made a place welcoming enough then the fairies would have to visit. If they didn't then that would probably be because they aren't real.
A little piece of paper was ripped up and a tiny bit of crayon was broken down to provide the fairies with the tools to leave her a letter to confirm they exist. She also knew that they would never arrive with the light on or if she was awake.
For the first time ever, she was in bed at 7 pm, lights off and shooing me out the door to get to sleep.
And the fairies? They did visit.