1) The drum is a membranophone, which means that it produces sound when a stretched membrane (usually made of skin) is struck. The drum is one of the oldest and most important musical instruments in Native American culture, and it is used in a variety of ceremonies and rituals. Drums are often made from wood, skin, and other natural materials.
2) The rattle is an idiophone, which means that it produces sound when the instrument itself vibrates. Rattles are made from a variety of materials, including wood, bone, and shells; often filled with small objects such as pebbles or seeds that make noise when shaken. Rattles are often used in healing ceremonies, and they are also used as a way to accompany singing and dancing.