A percussion instrument, such as a shaker, has a first disc-shaped member having an outer annular flange defining a first outer perimeter and a second disc-shaped member defining a second outer perimeter different than the first outer perimeter. The first and second disc-shaped members are directly interconnected to form a cavity therebetween. A plurality of sound producing particles is disposed within said cavity defined by the first and second disc-shaped members. The instrument also includes a mounting system for mounting to a vehicle such as a tambourine, hi-hat, cymbal etc. for causing movement of the shaker instrument.