Below, I am attaching a link about elderberry. I won't go into much detail here because it would defeat the purpose of reading the article itself. I know elderberry works because we've used it for our family. It works well for us when combined with echinacea for allergies and runny noses (even ones that are caused by teething).
The goal is to be helpful to you. Each box has it's own unique needs, so if this is something that can be useful to you (and them), then I have accomplished my goal. From there, I wish you well. :)
http://www.gwens-nest.com/natural-remedies/elderberry-recipes