Sesame Street has had some great little musical shorts over the years. One amusing series was the "Number Guy".
Number Guy - 1 ( https://www.youtube.com/watch?v=NCpLMlRAUEE )
Number Guy - 4 ( https://www.youtube.com/watch?v=7uOR0p7L3Ew )
Number Guy - 9 ( https://www.youtube.com/watch?v=tLA3-gpnWJo )
Number Guy - 10 ( https://www.youtube.com/watch?v=HBauqARk8lY )
You can even watch "Number Guy - 1" reversed, if that's your sort of thing:
https://www.youtube.com/watch?v=cqSbf5jcJZ0
