There is a blog has a list of 30 vids to help prepare kids for birth. They are arranged in order from least intense (just photos, no birth noises or vaginal shots) to more intense, so you can work through them or just choose where you think your kid is at.

They sell a book so i don't think i can put the link here, but i can PM the direct link if you want it. Otherwise you can google "codenamemama" and then in the search box type "natural birth videos". This takes you to an article on Preparing your child for a new sibling, which has some great tips and resources. If you go to V. Prepare for and Involve your child in childbirth- 6. Look at Pictures and watch videos There is a link to "30 natural birth videos and slideshows to prepare children for labour and birth"

Alternatively, just google "30 natural birth videos and slideshows to prepare children for labour and birth" (without the quote marks) - only just worked out this worked after i typed out the other bit.

The site has some great articles and resources.