An entertainment robot is, as the name indicates, a robot that is not made for utilitarian use, as in production or domestic services, but for the sole subjective pleasure of the human. It serves, usually the owner or his housemates, guests or clients. Robotics technologies are applied in many areas of culture and entertainment. Expensive robotics are applied to the creation of narrative environments in commercial venues where servo motors, pneumatics and hydraulic actuators are used to create movement with often preprogrammed responsive behaviors such as in Disneyland's haunted house ride. Entertainment robots can also be seen in the context of media arts where artist have been employing advanced technologies to create environments and artistic expression also utilizing the actuators and sensor to allow their robots to react and change in relation to viewers. Toy robot Relatively cheap, mass-produced entertainment robots are used as mechanical, sometimes interactive, toys which perform various tasks and tricks on command. The first commercial hit was, not surprisingly, modelled on the most popular pet: the canine. Robotic dog Robot dogs as a fad have been produced with relatively little variation. These are some commercial models: Teksta, a toy robot dog popular in the 1990s which was intended to be able to perform card tricks and respond to commands. Aibo (robot dog manufactured by Sony) Poo-Chi I-Cybie iDog (Sega's robot iPod music speaker) Gupi, a robotic guinea pig Space Dog, the remote control dog Robot dogs also appear fairly frequently in fiction compared to other forms of personal entertainment robots. K-9, The Doctor's portable computer and robot, from the British BBC Television series Doctor Who. Preston, Wendolene's robot dog from the 1995 animated Wallace and Gromit film A Close Shave. Goddard, pet of Jimmy Neutron. Humanoid entertainment robots Despite those humanoid robots for utilitarian uses, there are some humanoid robots which aims at entertainment uses, such as Sony's QRIO and Wow Wee's RoboSapien. They are usually capable of some advanced features like Voice Recognition or Walking. Substitute pets While primitive robot toy models only execute standardized pre-programmed routines, sometimes little more than a wind-up toy could do, advancing technology allows for interaction with the user and/or other environmental stimuli (e.g. sensor-detected obstacles), thus somewhat resembling a live playmate. Nevertheless, in the mind of some users the things can hold the loved place of a pet, as demonstrated by the fact that some even sleep with a