Answer:
I have four wings but cannot fly. I never laugh and never cry. On the same spot always found, toiling away with little sound.
We are five little objects of an everyday sort. You will find us all in a tennis court.
I can travel from there to here by disappearing, and here to there by reappearing.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?