I want to personally recommend Musica Antigua de Albuquerque's concerts, especially for anyone studying medieval/Renaissance history. They are a very talented group of musicians (though I am biased, my husband is in the group), and the concerts truly transport you to a different place and time! The concerts are open to kids, though it would be best for an older kid (or just a patient kid). The music is generally quiet, the concerts usually around 2 hours with an intermission. The programs are really well done, so there's lyrics and other info to read while listening. I went this weekend- it's their annual Christmas concert- and it was really beautiful.
Children under 12 $6
"In Natali Domini"
Christmas Music from the Middle Ages & Renaissance
with Narration by Phil Bock
Sunday, December 7, 4:30 p.m., Santa Fe
Sunday, December 14, 4:30 p.m., Albuquerque
Sunday, December 21, 4:30 p.m., Albuquerque
"Songs of Chivalry"
Knights, Ladies, and their Troubadours
Sunday, March 8, 4:30 p.m., Santa Fe
Sunday, March 15, 4:30 p.m., Albuquerque
"Saints & Sinners"
Virtues & Vices in Days of Yore
Sunday, May 10, 4:30 p.m., Santa Fe
Sunday, May 17, 4:30 p.m., Albuquerque