Well, Gary, I downloaded the Menzter Red Box a while ago, and somebody gave me a copy of the (O)D&D cyclopedia. You can't get as simple as that. Well, except maybe the Blue and White books.
I've read somewhere to do simple D&D with your kids. At least, that's a quote on what you said. So, I stashed said products on one of my CDs and hope to introduce them to my offspring when they come of age (around 8 to 10, maybe I should expose them to He-Man cartoons first; that's what really got me connected to D&D).