Answer:
Salty water everywhere but not sea in sight.
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
The more you take, the more you leave behind.
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
I have two eyes in the front and a lot of eyes on my tail
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?