How does that work?? How can it be a band if they don't play instruments?
Drummer jokes are pretty much synonymous with banjo jokes, aren't they? (And viola jokes, accordian jokes, and to a certain extent, bagpipe jokes...)
These are 12-13 year old boys. Don't expect logic to be a major consideration here.
The other boys have the instruments. But Jr. has been in band for 2 1/2 years and at least knows how to play. The only other kid with talent is the guy that's gonna be the vocalist. He's actually pretty good.
And trombone players too. And they are all right here.