My son loves Mother goose a lot.
I start to play CDs and read the books to him when he was around 6 months. At first, i really don't know whether he understand or like them or not. But after i 2-3 months, he enjoys the songs very much. Every time, i sing the songs to him, he will move/dance/laugh. One important thing is that he enjoy reading the books. At 1 yr old, He loves to go to the bookshelf to pick the books to read himself!!
Now he is 18 months, he already learned many words from mother goose (eg bus, star, hand, foot etc) and followed the actions taught in the VCD (match, clap, raise hand, fall down etc).