Answer:
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
I occur twice in eternity. And I'm always within sight.
What fastens two people yet touches only one?
What was the first man made invention that could see through a wall?
Casper was a friendly one and Demi Moore made a clay pot with one.
What is big and yellow and comes in the morning, to brighten mom's day?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?