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Collisions with young pedestrians often have serious traumatic and financial consequences. Allegations of negligence are frequently made against the drivers of involved vehicles, on the basis that they failed to take evasive action. A key element in determining the time available to the driver to avoid a collision is the speed of the pedestrian. In some instances, the young pedestrian is initially stationary in full view of the driver and then runs into the path of the vehicle. When this occurs, the acceleration of the pedestrian is an important element in determining the available time. This paper reports on accelerations from a standing start and associated walking, jogging and running speeds of pedestrians 5 – 17 years of age. Because children can vary considerably in height and weight for a given age, the effects of height and weight on acceleration and speed are also reported.