My 14 month old loves the Baby Genius series, and finds it more stimulating than Baby Einstein. They are much less expensive than Baby Einstein and come with a bonus music cd. I think they are plenty educational for those under 3, especially if an adult engages the child in talking/signing the animals they see on the screen. The classical music found in many of the dvds is pleasing for the adults in the family too!
Baby Genius Underwater Adventures