Does your child enjoy Dr.Seuss? I bet they do. If they don't - I'd take them to the doctor ASAP (just kidding...kinda). I discovered the secret by reading There's a Wocket in My Pocket! to my cousins energetic daughter one night. While we were getting real into the book, I turn to look at her for her to finish a sentence. To my surprise - she was asleep.
In elementary school I remember the librarian reading us a book by Dr.Seuss that made us all yawn and very sleepy. I did my studies, and it took longer than it should have. Considering it's literally called "The sleep book". I was thrilled once I ordered a copy of my own. I tested it out on my cousins adorable little girl, and my oh my did it work! I've used this book on many children. Wide awake, rebellious, and even the "I'M NOT TIRED AND NEVER WILL BE" kind. To be honest, while I was suffering from insomnia it even put me out. After days of no sleep, various medications, and some tea. Nothing worked. The Sleep Book did! This book works wonders.