Answer:
Come up and let us go. Go down and here we stay
Left to right Iām quite bright. Right to left I might bite.
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
The ones who see it may go blind, Contracting the fool's madness. You have to dig to find it, Crush big stones or mine it. Wash dirt clumps in a pan and wait for it to settle, A shiny, precious metal.
We are five little objects of an everyday sort. You will find us all in a tennis court.
If I say "everything I tell you is a lie", am I telling you the truth or a lie?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?