Kids explore fractions, while writing a colorful melody, without even knowing how to read music! Fill glasses up with different fractions of water and add food coloring. Provide students with paper to write their songs. Have kids make a hypothesis about why the glasses of water project different sounds. Is it the color of the water: No! Kids will be wowed at how water level makes an impact on the sound that projects from each glass. The fraction of water in each glass produces a different pitch.