1. Echinacea (Echinacea Purpurea)
Echinacea is an immune stimulant and can be used to shorten the duration of the common cold and flu and reduce symptoms like sore throat, fever and cough.
2. Elderberry (Genus Sambucus)
Elderberry is an immune boosting herb, that decreases inflammation, rich in antioxidants and vitamins and is beneficial for cold and flu in kids.
3. Astragalus (Astragalus Membranaceus)
Astragalus protect and support the immune system, preventing colds and upper respiratory infections. Reduces sneezing, shortness of breath and runny nose.
All of these herbs can be beneficial for colds in kids. I recommend working with a alternative health specialist.