Answer:
I am filled with garb the price is free. Just return what you don't need.
I'm the source of all emotion but I'm caged in a white prison.
Only one color, but not one size, stuck at the bottom, yet easily flies. Present in sun, but not in rain, doing no harm, and feeling no pain. What am I?
Sing me to a baby about to go to sleep.
Though I am only two words I have thousands of letters in me
A little house full of meat, no door to go in and eat.