When I was a kid, from ~14-18yrs old, I was a member of a chamber music society designed by all the music professors and orchestra members in my city solely for high school students.
We were all extremely talented; competitive on stage, but friends for life off-stage. We had a blast. There were singers, string players, woodwinds, brass kids, harp, and pianists. We would be grouped together randomly into duos, trios, quartets... based on our instrument, then assigned a piece. We would perform in the museum downtown and in competitions. Sometimes, if our little chamber music groups really meshed well, we would stick together and perform for churches and other events.
Our own personal music instructors would coach us. Our quality was quite high, and everyone was very serious. Among the music performed, if I remember correctly, were the Mendelssohn trios, Cooke's Songs of Innocence, Schubert's Trout, Beethoven's Ghost, Schubert's Shepherd on the Rock, Debussy's petite suites, Bach cantatas...
I am a HUGE advocate for getting kids, tone-deaf or piano prodigy, involved in either chamber music or a choir of some sort. The amount of musical development forged is incredible. Listening skills, harmony, intonation, phrasing, jam-sessions, improv, sight-reading/singing... PRICELESS. Incidentally, nearly all of us in the chamber music society I described above were also members of our city's world-renowned/traveled children's chorus.