My 10 year old 4th grader started learning trombone this year. His friends on saxophone brag that their instrument can (eventually) play 54 notes. Does anyone know the range of a trombone, top to bottom.

So far, my son can play 5 notes

The instrument doesn't determine quantities of notes, the player does. Without the human component the Trombone cannot play itself....

Depends on what scale you're using.

BTW, the trombone is MUCH louder, there's something to brag about!!!

OK Wiseguys. I'm just trying to get an idea about this. Can it range > 2 octaves? Anyone know highest and lowest notes that are usually played w/trombone?
Give me a break!

The normal range of the trombone, also known as the tenor trombone, is from the E on the first line below the bass clef (E2) to the B-flat above middle C (B-flat4). The tenor trombone is typically used in bands and orchestras.
Source:

Virginia Tech Music Library: Trombone

That's about 2 1/2 octaves. I'm not a trombone player but I'm guessing this is a comfortable range and can be exceeded at both ends.