doTERRA diffuser blend for sleep. Serenity, Lavender, and Balance. I added a few drops of each to a cotton ball each night and stuck in my daughters pillow case. Brilliant, she is out in less than 30 minutes!
As far as all-natural formulations, TerraShield works well but is costly. Another downer: To ensure you're actually getting the real deal, you need to order it from a doTERRA sales rep (it's a direct-sales company).