Answer:
A tiny bead, like fragile glass, strung along a cord of grass.
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
Pointing North, South, East, and West it saves the lost and helps the rest. What is it?
There's one in every deck of cards and in a famous movie
Environmentalists want to keep this from drying.
Why is the letter B always cool?