Amazon has revealed its latest autonomous delivery project -- a six-wheeled boxy robot named Amazon Scout. The e-commerce giant said the all-electric devices were created in-house at Amazon's research and development lab in Seattle, and are about the size of a small cooler. The bots are meant to travel on sidewalks at an average walking pace, delivering packages "in daylight hours" between Monday and Friday. Only six Scout delivery robots are currently being tested in a single neighborhood in Snohomish County, Washington. According to Amazon, human supervisors will accompany the robots during the early stages of the trial to ensure that the devices can properly navigate around obstacles like people and pets.