Answer:
I help engines spin and pants stay up.
I move without wings, between silken strings. I leave as you find my substance behind. What am I?
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?
When I point up, it's bright. When I point down, it's dark. What am I?
I let water fall on you while everyone else stays dry. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic