(Madeline Green/CBC) "It's quite fun," Lapp said. This isn't the only instrument made from kelp: in South Africa, the Lekgodilo flute is made of dried kelp, and dates back thousands of years.

Lapp also wrote Centennial's alma mater, which will be performed. His choirs made a habit of closing concerts with his song, "Blessing," another number the alumni choir chose.