Answer:
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
A little house full of meat, no door to go in and eat.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
What did the piece of wood say when he saw the screwdriver and screws approaching?