Answer:
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead.
I am an object which is used in baseball. During the day I can't be seen at all. What am I?
I am a person who pretends to be someone else
I work when I play and play when I work. What am I?
Fashions change, but what can a person wear that is never out of style?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.