Abstract: In recent years, more and more intelligent toy car, toy car market share of traditional gradually shrink, high-tech interactive toys, electronic toy industry has become the mainstream of development. Currently on the market sold toy cars, when in use by the players themselves to control the car hit the road, and in the process will be controlled using the impact of distance, so great inconvenience to users, but also reduces the fun of toys sex. This design is now the mainstream of the major toy car based on the installation of various types of sensors, the car can only achieve control. This thesis is the function of small cars with the entertainment on the system design, function realization using infrared sensors to detect obstacle avoidance, alarm; entertainment is the installation of the lcd display, music, and led color lights and so on.