We recently had the "sex talk" with our 8-year-old daughter. It was a positive experience for us and her. It doesn't have to be a scary or taboo topic. With a simple plan and some ideas you can successfully talk to your kids about this important subject, before they hear about from someone else!
Fertilization video: https://youtu.be/_5OvgQW6FG4?si=nvy2sAXX9Ra7C1c7