Answer:
Kings and queens may cling to power and the jesters may have their call. I am the most common but I can rule them all. What am I?
Who keeps the ocean clean?
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?
What has a head but never weeps a bed but never sleeps can run but never walks and banks but no money?
What has many keys but can't open a single lock?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.