L.C.
If you have a Mandarin playgroup, Culture Cubs offers discounts on group orders of bilingual DVDs. You can see clips from the shows at [[http://www.culturecubs.com]]. They really are a fun way to keep children interested in learning.
Updated
If you are part of a Mandarin playgroup, Culture Cubs DVDs are a great resource. They're made by two mothers who wanted the shows for their own children and are very popular in Hong Kong. They offer discounts for group orders. www.culturecubs.com