Hi Roland,
Welcome to the TM forum!
You have a Harry B. Jay cornet, though without a photo I'm not sure what model it is. It may say so on the horn, and it may be the Columbia model.
And yep . . . you've got something to talke about to the kids alright . . . for the great Louis Armstrong himself played a Harry B. Jay Columbia cornet in the early 1920s with King Oliver's band!
It is one of those cornets that collectors would like to own, due to the fact that ol' Sachel mouth himself once tooted one!
Armstrong eventually switched to trumpet as a member of the Fletcher Henderson orchestra around 1924, to blend with the two other trumpeters.
You've got a really great cornet to use in your discussions . . . and I really can't think of a better one to introduce kids to early jazz!
The Jay company was headquartered in Chicago
You may already be familiar with these sites. If not, give 'em a look!
Satchmo.net • The Official Site of the Louis Armstrong House & Archives Harry Jay Columbia Cornet default
The latter site is Nick DeCarlis' wonderful site on vintage cornets, and he includes a couple of Columbias in his photo section.
I see you are from Florida. Nick lives in Hogtown (Gainesville) so you might want to drop in a line. He has a wealth of knowledge on cornets and is a fine cornetist himself, in the pre-1950s tradition!
Hope this helps,
Tom