The Roomba is a robotic floor vacuum from iRobot. One of the amusing things about Roombas is how pets interact with them. In this video below a clever cat takes the Roomba for a ride.
You can see many other videos involving pets and Roombas on YouTube by searching "cat Roomba" or "dog Roomba." iRobot says in a Faq that the Roombas are pet friendly.
Each pet responds differently. Most are initially curious but will quickly learn to ignore it. Although some pets play with Roomba! Special safety features, including gentle-bump sensors, anti-tangle technology and automatic shut-off, keep your pet safe and ensure that noses and paws will not be harmed if a curious pet interacts with Roomba. We recommend that you run Roomba for the first few cleaning cycles while you are at home with your pet(s) so they can get used to it. After that, you can run Roomba whether you're at home or on the go!
They also sell a Roomba version (see here) that is designed to deal with dog and cat hair. If you have an older Roomba model they also sell a $29.99 upgrade kit for the 400 Series and Discovery Series robots to increase the Roomba's capacity to tackle pet hair. You can buy Roomba directly from iRobot or from other retailers including Best Buy, Buy.com and Target. Amazon.com also carried a number of Roomba's - you can see Amazon.com's selection here. (via BuzzFeed)