Answer:
What kind of nut is empty at the center and has no shell.
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
What does everyone know how to open but not how to close?
Crooked as a rainbow, and slick as a plate, Ten thousand horses can't pull it straight.
A kind of weather that comes your way, but add a "D" and it will run away
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?