Imagine your father is J.S. Bach, not the one whose chorale settings you had to study in harmony class -- without text all their wit is lost! -- but the one who loved to improvise, indeed, to intersperse improvisation with rigor so seamlessly that it takes years of bumbling through to figure out the difference...
OK Back to the top: Imagine your father is that latter J.S. Bach and that he has written for you, his extremely talented 13-year-old son, some fool-around pieces. Wouldn't you, knowing him as only you do, have a blast trying to amuse him with your take(s) on each distinctively witty undertaking?