Answer:
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever. What am I?
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
I always go to bed with my shoes on.
A little house full of meat, no door to go in and eat.