Answer:
What is really easy to get into but really hard to get out of
A locked sphere without hinges or key. Break me open and golden treasures you'll see
Even the oldest ones can be described as current, but a little mainstream.
When one does not know what it is, then it is somethingอพ but when one knows what it is, then it is nothing.
What is flat, usually square, and made from trees but isn't wood?
What goes around and around the wood, but never goes into the wood?
Kids
Animal
Difficult
Easy
Food
Funny
Logic
What am I?