Foolishness is a silly little piano duet that I wrote for my daughter or my husband to play with me.  Instead of one person playing high, and one person playing low, I've got the main person playing seated in the middle of the piano, with the other person playing a simple part that forces them to dart back and forth from low to high and back again over and over behind the seated player.  In order for the bass part to sound continuous, the seated person plays quite a lot of it, and it will take a little bit of practice at catching the darting person's bass notes with the pedal and holding it for them while they are flitting back up to play the high parts.  It should be fun to perform!