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.
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
The more you work the more I'll eat.You keep me full I'll keep you neat.
I save lives on the ground and in the air. What am I?
I am an object which is used in baseball. During the day I can't be seen at all. What am I?
I build up castles. I tear down mountains. I make some men blind. I help others to see.