Dallas Symphony Orchestra
Dallas Symphony Orchestra Kids: Chimes
The chimes are the tall tube looking things in the orchestra. Read more about percussion instruments, the chimes in particular. Use RealAudio or Windows Media Player to listen to the chimes on their own and with the orchestra.
Wikimedia
Wikipedia: Percussion
A basic article on percussion instruments lists several examples of percussion instruments, provides a distinction between membranophones and idiophones, and lists instruments that are tuned vs. ones that are not.