DS is 2yr 9mos and has been having a really hard time settling down to fall asleep. We do a very long bedtime routine which helps him relax but even after an hour+ of bath, books, songs, it still takes him a long time to fall asleep.

I'd love to try essential oils to help him relax, but I don't know anything about them. I'd love your reccos!

What brand do you use?
What kind(s)?
How do you use it - diffuser, topical, something other way?
Other tips?