This wonderful example of handcrafted pest control (see Mouse Traps) is a Khmu rat trap from the Traditional Art and Ethnology Center (TEAC) in Luang Prabang. Not really sure how this thing works, but I bet the rock is what interacts with the rat. [NOTE: TEAC is a small but lovely museum with a well-curated collection of traditional art and utilitarian items from a variety of different ethnic groups in Lao PDR].