I know a lot of you will be worried about unwanted facial and body hair in kids. For most kids all the hair will fall off within a year but some kids do retain it due to heriditery factors. If you want to get rid of it whne they are young you can try the kuppaimeni Powder.
Kasturi turmeric also is a great remedy when mixed with honey and applied. Honey add to teh moisture. But somehow my kid was allergic to kasturi turmeric.
So my aunt suggested kuppaimeni leaves. I hunted far an dwild but never found it. Finally we got it sourced from an aurvedic shop in Chennai. Please look through all Ayurvedic shops you will surely find it. These leaves are also used to treat astama and bronchitis when consumed. But I have no expereince with that.
For hair removal, mix this powder with a little wanter and apply on the face and body daily and wash off. If you apply over night its even better. It smells like mehendi leaves.
According to wiki: