What is a marching band exactly?
You can call them a group in which instrumental musicians perform while marching, often for entertainment or competition.
Oh that sounds hard! what instruments do they play?
Most times they play brass, woodwind, and percussion instruments.
What are brass instruments?
They are generally usical instrument that produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player's lips.
Can you give me an example of a brass instrument?
i do not know if an example but when you hear names like  "labrosones",  it means "lip-vibrated instruments".
Okay, it seems like it would be difficult to play these instruments and walk. How many people are in a marching band?
Marching band
A marching band is a group in which instrumental musicians perform while marching, often for entertainment or competition. Instrumentation typically includes brass, woodwind, and percussion instruments. Most marching bands wear a uniform, often of a military style, that includes an associated organization's colors, name or symbol. Most high school marching bands, and some college marching bands, are accompanied by a color guard, a group of performers who add a visual interpretation to the music through the use of props, most often flags,
, and media.
Arts, entertainment, and media Music.
- Musical ensemble, a group of people who perform instrumental or vocal music
- Band (rock and pop), a small ensemble that plays rock or pop
- Concert band, an ensemble of woodwind, brass, and percussion instruments
- Dansband, band playing popular music for a partner-dancing audience
- Jazz band, a musical ensemble that plays jazz music
- Marching band, a group of instrumental musicians who generally perform outdoors