Laotian Bronze Rain Drum Obtained in Laos 1970 with traditional details. Laotian rain drums, originating from the Karen people of Laos and northern Burma, are ancient,, bronze artifacts used to call rain at the end of the dry season. It is decorated with geometric motifs, fertility symbols. frogs, rice grains, and water-related motifs. Drums like these drums are believed to please spirits and evoke rain. They are traditionally crafted using the lost wax method and are frequently used as decorative, low tables or, side tables.