Here's a good one......

Try this little riddle...... We are very little creatures; all of us have diffrent features. One of us in glass is set; one of us you'll find in jet. Another you may see in tin, and a fourth is boxed within. If the fifth you should pursue, it can never fly away from you. What are we?

Not too hard but i'll post the answer in a few days if no one gets it.
By the way I love riddles! If ANYBODY wants to send as many riddles as they want, feel more than free to do so.