Sex education books
Or buy some sex education books for children, read them together and explain them while reading, so that children will understand them more easily.
Dynamic video
With the development of science and technology, you can also watch videos with your children, educate them through dynamic videos, and share some sexual knowledge with them.
Education in bathing
When you usually bathe your child, you can also tell your child which places are private and no one can touch them, so that the child can understand.