What is the right age for Puberty and Period education

A. These days it is happening early so by the age of 10 years roughly it should be good if you start teaching little bit to the child because these girls puberty really really very scared so if you tell the basics also look for the science like your child should have vaginal hair and under arm hair together so you know the period will come in 3 to 6 months so look for all these things and tell your child if you see anything happening let me know so just this is the right age where you can start