D.H.
I typically buy my probiotics from a local health food store. They have some in the fridge and others are shelf stable. I used to use the ones that need to be kept in the fridge, but have since moved on to the shelf stable ones. I love the Jarrow Brand.
I remember when my son was 4yo and I gave him 8 capsules in one day. You can use it with anything. On top of cereal, in drinks, however you can get them to take it. Although I must say that you really should stay away from cow's milk...very mucus forming and can cause frequent colds, sore throats, etc., which is why when you are sick, docs say to stay away from it, but I'd say stay away from it all the time.
Essential oils can be used in so many things. I would only use lavendar and tea tree neat (undiluted). Any others you really need a carrier oil if you are to put them on your body directly. I can't get to my Essential Oil book right now, but there are many that you can get and learn all about them. I buy my oils from www.compassconcepts.com. She is a Master Herbalist and she is ever more knowledgeable about aromatherapy. I know you could email her and even call and ask her some questions about them. Also she has a yahoo group called scentsations if you would like to join and learn more and ask questions. She also will sell many different synergies and neat a couple of times a year at a wholesale price. She is extremely picky about her oils and gets them from all over the world from reputable growers.
In our house, we have many oils. I use jojoba as a carrier oil for the essential oils and sometimes almond or grapeseed. I use Eucalyptus and rub it on our feet when we are congested (again, you need to use a carrier oil before applying). Rub it on the chest. Have you ever had sinus pain in your face, etc. I've taken a pot of boiling water...took it off the eye and placed on the table and got a towel and put a few drops of Eucalyptus oil neat in the pot and breathed in through the nose...it will be very strong at the beginning of each dose to the point that I'll have to lift the towel, but then I keep doing that for about 15 minutes...the drops only last in the pot of boiling water for a short time...few seconds. Anyway, it takes that pain away or almost away depending on how bad. Sometimes you have to do it a second time the next day or two, but then you feel so much better afterwards. I could go on and on, but can't. So tired and have to go to bed.
Buying a book on them would help you learn many things about what different oils are used for.