Easier one: We are small creatures; Each of us have unique characteristics. One of us in glass is set; Another, you will find in jet. One more you could observe in tin, And the final is boxed within. If you should search for the fifth, It can't fly away from you. What are we? There you go!
*sigh* no one likes this anymore... It was really fun though. What else could we do like this? Any suggestions?