What essential oil is good for congested nose and coughs for a 6 month old baby? If diffusing is the safest method , can it be done with baby in the room?

You may find this article useful: http://www.learningabouteos.com/index.php/2014/02/07/essential-oils-and-children/ In the article is a list of oil that are safe for children. There is also a link to find out which oils should be avoided. Hope this helps! In short, essential oil needs to be properly diluted (http://www.learningabouteos.com/index.php/2013/08/07/properly-diluting-essential-oils/) to be used on babies and toddlers.