Answer:
What does everyone know how to open but not how to close?
The older they are the less wrinkles they have.
You can read it both ways, I wear; One way it's a number, reversed a snare.
More precious than gold, but cannot be bought, Can never be sold, only earned if it’s sought, If it is broken it can still be mended, At birth it can’t start nor by death is it ended.
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
People take me on walks and I run and have fun. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?