If you cannot sing well or read music, invite a musically inclined teacher or parent to help with this activity. If the teacher does not supply the rocks, the students should be asked to bring in appropriate materials for rocks andcontainers. You may take one of two approaches to obtaining the instruments. Ideally, ask each student to bring two fist-sized rocks to class. In some neighborhoods, you might bring ina bucket of rocks yourself.
Students shouldseal the gravel inside a container.
Encourage students to decorate their instruments with paint, ribbons, sparkles, or natural objects. Encourage cave motifs Encourage students to compare the sounds made by their instruments. It's best done outdoors, or in a large room or an auditorium. Some rock instrument sounds will be higher in pitch, some lower. It may be difficult to distinguish the difference.