Dear J.,
We have had amazing success with "liquid bentonite". You can order it from www.vitacost or look for it locally at a health food store. I recommend the brand "Sonne". Bentonite is a liquid volcanic ash. It binds itself to irritants in the gastrointestinal tract and takes them on to elimination. This action is called "adsorbtion" (versus "absorbtion) which means, it pulls impurities from the soft tissues in your GI tract, helping to relieve stomach flu, food poisoning etc...very quickly. When your body is vomiting, it is attempting to rid the GI tract of impurities. Bentonite binds itself to those impurities and they are then flushed out of the body via a bowel movement - much less violent and taxing on the body.
Any one of any age can take liquid bentonite. It is impossible to overdose with this product as it is totally benign. The literature that comes with the bottle is very clear and straightforward. I mix a 1/4 cup of it with a full cup of warm water and have my son sip it (he is 3.5 now)in a sippy cup with a straw. It has a chalky taste to it. This has also worked wonders for me, my husband and other moms in my moms group who have them selves been terribly ill from the flu. It has literally stopped vomiting within a few hours of taking it. I asked my pediatrician about it and she thought it was a good idea. Turned out to be a great idea.
You can read about it here: http://www.healthysales.com/SONNES/sonnes_7.php
Best of luck to you and hope your little one feels better soon!
-S.
Mom of Sam 3.5 yrs old