Also known as tinwhistles or just whistles, pennywhistles are very popular in Celtic music. They also show up in musical theatre scores on occasion. Brian plays a combination of Generation whistles and Susato whistles. The Susato whistles are made out of ABS plastic in North Carolina.
From left to right: G Generation, F Generation, Eb Generation, D Susato, C Generation, Bb Generation, Low D Susato