My kids loved to watch, sing along & dance to the music as they were growing up. They watched the DVD's over & over and now I recently purchased a set for our grandson who is 1 year old. I am sure he will get just as much use out of his as our kids did. We also had the songs on CD so we could listen in the car.
Video and songs were highly active, very clear lyrics, buth audible and visual. My only reservation was that some of the songs have "established" movements that were not represented in the videos, and children had to choose whether to look at the video or at the song leader.