Answer:
What is so delicate that saying its name breaks it?
What hangs in the sky by day but at night goes away?
Whipping one of these out in the wrong setting is said to be terrible luck.
What gets broken when you don't hold it?
A mechanism to discover who is following you.
The sun bakes them, The hand breaks them, The foot treads on them, And the mouth tastes them. What are they?