Answer:
The one who makes it, sells it. The one who buys it, never uses it. The one that uses it never knows that he’s using it.
A box without hinges, lock or key, yet golden treasure lies within.
What surrounds the world, yet dwells within a thimble?
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
We are five little objects of an everyday sort, You will find us all in a tennis court.
It's what light turns into in the night
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?