Answer:
When set loose I fly away. Never so cursed as when I go astray.
When it is alive we sing, when it is dead we clap our hands. What is it?
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
The man who made it didn't need it. The man who bought it didn't use it. The man who used it didn't want it.
The older they are the less wrinkles they have.
Special abilities and brightly colored underwear are all you need to be one of these.