[Ainaserkewen]

Hi, more info:
My range is the D above the staff to the F# under the staff(treble Clef of course, though I can play in Alto Clef)
And for the duet Idea, ummmm, trumpets rarely go well with other instruments besides other brass, so the trumpet-piano idea won't sound so great. Just to let you know that any melody written for trumpet must be transposed into Bb(Cause that's what key my instrument is in) instead of just concert pitch like the piano.
You're idea for the song sounds great though, enjoy the creativity of it all.