A more long term approach - my daughter has CF so is prone to chest infections and the parents on the CF Trust website swear by high strength garlic capsules, throughout the winter (that could be for all the family, not just the toddler) and manuka honey. You can use the honey in food or just give a teaspoon of it 'neat'.
I don't know, sorry PhDiva - I've only just read about them myself, so am going to start giving them to my DD. I would be very surprised if there were side effects. DH already takes them and swears by them.
I use olbas oil (children's version) for helping un-stuff noses- just a couple of drops on bedding or clothes.
Using onions in cooking (soups if your LO is like mine and not keen on seeing onions in food!) is meant to be good as can help thin mucous.
Echinacea is also very good- the homeopathic version comes in very small powdery tablets that LOs can easily swallow- use 6C strength for children.
To ward off colds this sounds pretty awful but leave a couple of peeled garlic cloves in the bedroom...garlic has strong antiviral properties but if your LO is under 2 garlic casules may be too strong and can cause indigestion. Cook with small amounts of it too.
Standing in a warm steamy bathroom helps...
Hi to Janni- my DD has CF too. Just started manuka honey also!