Sweeter Than Sweets has a fantastic idea to share the true story of advent with your children.
Basically, you set up drawers, envelopes, etc. with numbers 1-25. You collect a specific list of items and read daily Bible passages that illustrate the story and how the object is significant in the advent story. Genius. Printouts and a full list are available at the Sweeter Than Sweets advent story link. Check it out!