Answer:
An artΒ-form and its colour-ful result.
What can be seen but not touched?
Proof you've done your time in school
You use it between your head and your toes, the more it works the thinner it grows. What is it?
What is something that can go up quite easily, but is not as easy to bring back down?
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?