"Mom, guess what?"
"Bella, at school, only she's not there anymore, but when she was, told me that she's magic, so she can fly!"
"Really? Do you think maybe she was pretending she can fly?"
"No, she really can. Guess why I know? 'Cause sometimes, when she drinks out of her water bottle, sometimes, it refills."
Proof Positive you have a magic child--her water bottle spontaneously refills. After that, there can be no doubt she can also fly.