Vac-U-Bots are the vacuuming robots that Lenny gives out in the gift bags, from his party for his friends. They are grey and round with three different settings: On, Off and Malevolent Sentience. Bart sets them to the third option (or as he calls it 'Kill, Kill, Kill!') and lets them loose on the guests. They surround Moleman and suck him up so there's only his glasses left. Although he's later seen being helped to his feet. They also chase Carl into a supply closet, then surround him as well. One of them tangles itself in Marge's hair, appearing to sink the blue tower. The police are called to the scene and shoot or cage up the remaining robots.