He occasionally introduced new materials, including at one point something that reminded me of a Meccano set. The roamers easily handled each test. I simply had to set the overall tasks, and they would operate with speed and efficiency. There was only one glitch the whole morning: when I was not quite clear enough with my directions, one roamer ended up tossing another one across the room. I know the doctor said the AMIs had no will of their own, but I could swear the tossee acted surly afterward.