The Calon Lap Bongos
The lap bongos have 6"& 8"  diameters and are about 1.75" deep. Also, many different types of woods are used, Most are hollow inside but some have a sectioned off space inside the has either beads or jingles. There are straps on each drum that go around the performers thigh so the drum does not slip off. You can use your hands or one of the many American Percussion Mallets. Call for pricing.