I have a friend who swears by putting on lavender diffuser and some lavender oil on her 8-month olds feet to help him sleep. Is it advisable to use a lavender oil on babies so young?

I have a friend who uses essential oils on her kids and swears by it. Here's an article that has a generally guideline on which essential oil is okay for the different ages. http://m.wikihow.com/Know-Which-Essential-Oils-Are-Safe-for-Babies The brand that my friend uses is called Young Living. I'm not too sure how much is it as I've not purchased it before but according to her, you'll only use 1-2 drops at a time so it can last pretty long.