Brass instruments are made from metal and are generally loud instruments. They require little assembly. Souhd is produced by "buzzing" into a mouthpiece and either closing/opening valves or adjusting the length of the slide on the trombone.
Students who choose a Brass instrument will become members of the Band.
Brass Instrument Demo Video
BBC National Orchestra of Wales - Brass Family
TED Talk - How Brass Instruments Work
House of Sound - How Brass Instruments make a sound