help my kids be self-confident

I am a firm believer in learning lots of skills for myself (eg public speaking – which requires LOTS of confidence).
My own radio shows helped me gain confidence in front of an audience.
I want my kids to have this skill so I devise a radio show and made them co- presenters (other kids were invited to present).
I was one of two guest (adult) presenters.
I think this helped them a lot.