(Please note I only use pure, therapeutic-grade essential oils from Young Living. I cannot attest to the effectiveness of other brands that may be synthetic and/or adulterated.)
If you have trouble falling asleep or staying asleep through the night, try Lavender or Cedarwood. Valerian also works really well, but it smells pretty bad! Other effective Young Living oil blends for sleep include: Peace & Calming, RutaVala, Valor, and Tranquil. None of these need to be diluted; simply rub 2-4 drops together in your palms, apply to the soles of your feet, and inhale what's left on your hands. You could also brush your hands over your pillow. Or add a few drops to a hot bath, together with a cup or two of Epson Salts, just before bedtime.
For snoring/apnea issues, apply Thyme diluted with a little carrier oil or pure olive oil to the soles of the feet and toes. Also try Lavender with Peace & Calming and Valor, or just Valor alone, as directed above.
I have heard that applying Peace & Calming behind the knees before bedtime alleviates Restless Leg Syndrome.
Young Living also has an all-natural supplement called Sleep Essence. It contains Lavender, Vetiver, Valerian, and Ruta essential oils, plus Melatonin. (Take 1-2 capsules 30 minutes before bedtime.)
Diffusing the oils is also quite effective and may be a good choice for children. Or apply 1-2 drops of Peace & Calming or Lavender to a child's feet, either full strength or diluted with a carrier oil or pure olive oil.
These are just a few suggestions. For more information on any of these products, please contact me or visit my Young Living site and click "Product Information" on the left.