About a year or so ago, my older girl was chanting, over and over, at the top of her lungs, "PRAISE ME, FIIIIIISH! THE JUUUUUUDGE!!! PRAISE ME, FIIIIIISH! THE JUUUUUUDGE!!!" Needless to say, I was stumped until she put it in "liturgical context." After a few more times, she said, "REJOICE IN THE LORD, O YOU RIIIIIIIGHTEOUS!!! PRAISE ME, FIIIIIISH! THE JUUUUUUDGE!!!" ("Praise befits the just.")
Around the same time, my younger girl, just learning to really talk, answered the Arabic Paschal greeting--Al Masih Qam--with "Honk, honk, honk." (Haqqan Qam.)
This year at SVS (and, wait, we have a Twitter?!), during one of the Vespers where a conducting student was leading the choir, there was about 20 seconds or so of dead air while everyone was waiting for "O, Gladsome, Light." My younger girl looks up at me and, in full voice, yells out, "NOW whaddawe gonna do?!"