Answer:
What breaks on the water but never on the land?
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?
What goes up but never comes down?
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
I tell people to be careful when handling boxes.