Zipper Beat

You called it an instrument, so I looked right down at my chest! That big white button slider was just sitting there, quiet. Gasp! I hooked one finger under the round loop and pulled—*zzzzzp!* A sharp, buzzing rattle zipped right up to my chin! When I flicked it back down—*zzzp!*—it gave a lower, clicky purr. I tried bouncing my red mallet on the white teeth right as it slid—*zip-tak! zip-tak!* It made a completely new, crunchy sound! My whole tummy tickled from the vibration, and I couldn't stop giggling.