Harmonica

First cut off the sticky part of the post it note. Then cut the non sticky part of it in half.
Next wrap the 2 non sticky halves around two of the popsicles. Finally put tape on each slide/ halve.

Put the slides back on one Popsicle stick. Next put a rubber band lengthwise on the stick with the slides. Finally tape the two Popsicle sticks together.

Blow in the middle of the harmonica. To change notes, slide the slides back and forth.

Happy playing :)