Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
What holds names and memories which are not its own?
Gold in a leather bag, swinging on a tree, money after honey in its time. Ills of a scurvy crew cured by the sea, reason in its season but no rhyme.
Feed me and I live, give me drink and I die.
Do you know what you can hold without ever touching it?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?