Answer:
What letter comes next: O T T F F S S ?
In Paris but not in France, the thinnest of its siblings.
A tiny bead, like fragile glass, strung along a cord of grass.
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
At night I come without being fetched. By day I am lost without being stolen.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?