love those Baby Einsteins. Bought the whole collection for my nephew years ago. The baby loves them now too. When my older nephew was 2 he wasn't speaking yet up to par yet, and after I got the videos, he said fish for the first time. I cried. Those are excellent, well thought out teaching aides. They use the primamry colors, lots of repetition and they discovered the use of classical music helps to absorb the information somehow.
I don't remember which one we were watching, but it kept showing bright colors and movement. I remember studies from years ago saying that classical music helped absorb information and started when I was in college always playing it in the background when I studied. I guess it worked....I graduated.