Answer:
A person's greatest asset.
This patch of land stands alone
Built of metal or wood to divide. It will make us good neighbors, if you stay on your side. What is it?
It's in your hand though you cannot feel it. Only you and time can reveal it.
You'll have to consult an optometrist if you want to improve this.
I will disappear every time you say my name.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?