Answer:
A tiny bead, like fragile glass, strung along a cord of grass.
What calls for help, when written in capital letters, is the same forwards, backwards and upside down?
What gets colder as it warms up?
Whipping one of these out in the wrong setting is said to be terrible luck.
What flies forever, rests never?
Special abilities and brightly colored underwear are all you need to be one of these.