Answer:
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
Pregnant every time you see her, yet she never will give birth.
Break it and it is better, immediately set and harder to break again
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
Though blind as well, can lead the blind well.
People take me on walks and I run and have fun. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?