Apart from this for rest precaution u can watch this 
https://youtu.be/7Sg0i9ntcg0

You can give tulsi ark in water, add few drops only. 
Or add few drops of ginger ark in honey.

<a href="http://app.babychakra.com/article/869">Excerpts from LiveChat with Dr Bhavi Mody: Immunity of children against cold and cough</a>

<a href="http://app.babychakra.com/article/3611">ImmunoMeter: Does Your Child Pass The Immunity Check Test?</a>

<a style="text-decoration:none" href="http://app.babychakra.com/article/2978">3 Immunity-Boosting Recipes for Kids</a>

what need to be done to avoid cough and cold without medicine during monsoon.