I am using Little music with my 4 year old, my 6 year old and my 8 year old. They ALL LOVE it. They are definately benefiting from it. As am I, btw. There is no upper age limit on this one.
The only issue I see with the older kids is that the cartoons in it are babies, wearing nappies. ( really I do think that kid should be toilet trained by now!
) but that is only in the one section and my kids havnt had an issue with it at all. Perhaps a 12 year old might. I can definatelyy recommend it for your older kids. For the little kids even a tiny baby listening along would get benefit from it. Regardless of the age of your baby, buy it for your big kids! We run in just before we leave for school each day, often while I brush the girls hair. If they are ready on time they get 2 lessons back to back, which they love.