Cows that say, "muh?" Sheep that say, "duh?" What is this madness? Or should we say, wackiness? This super simple, repetitive, catchy tune is wacky. Or more appropriately, "whacky" – as in Boomwhackers®. You don't have to include them but the title rather implies their usage, so whack 'em if you got 'em. Or use ukuleles to play the written single notes. (from Music K-8, Vol. 30, No. 5)