My kids are interested in acting, especially the girls.

All actors should try their hand at voiceover acting, I think. I believe voice overs give actors the opportunity to really expand.

Christopher Reeve was famous for making it go right through turning his talents to voiceovers, but if you watch cartoons, you'll recognize many actors you've seen, particularly on sitcoms.

Here are some of my favorite voiceover talent sites:

Voiceover Resume

Celebrity Voices

Voice Over Resume - Adult Education

Male Voice Over Talent