Had I taught little kids, I may have discovered these fantastic singers - The Wiggles, children's musical group from Sydney, Australia - a couple of years ago. But I did it only now, and like a kid myself, I kept listening to their songs and crooning along until I thought I had heard enough.
It is a must for those who work with little children! Check The Wiggles on YouTube or search Google or Yahoo videos. Even adults might love listening to these cheerful, catchy and relaxing songs!