My Dad and I went to Home Depot and
bought a 1x4 board and I measured 7 1/2". My Dad cut
it and I held onto it Then I found some 2" hole straps
in his shop. I found bolts in some boxes. I drilled
some holes in it and popped the screw into the holes.
I spray painted it 2 times and let it dry for the day.
Then I put the sandpaper on it.
I slide the sand blocks against each other and in the
middle is the sandpaper to make the noise. You move the
blocks in the upright position back and forth.
I slide them together lightly to make a lower
sound. If I push them hard I get a louder sound. The
timbre of the instrument is rough. You can change the
dynamics by rubbing the sand blocks together soft or