This is a DIY kit for composing music. The core of the kit is a set of clear plastic one-bar measures of music that can be flipped or reversed. So you can't freely manipulate notes or make your own melody -- you arrange or rearrange an existing one.

Each side contains a number code that is manually entered into the computer (required). This creates a score that can be played back or printed. The kit was invented by composer Philip Sheppard.