I watched, silently laughing as a friends 6 yr old totally failed to operate anything but the throttle on a fairground electric car ride. Throttle wide open she drove a graceful curve into the side barrier, rebounded and hit the central barrier and stayed there with motor stalled until the attendant pulled her away from the barrier, a repeat, slightly less than graceful curve ensued, as she tearfully hit the poor kid driving in the correct direction head on. She had zero idea about steering, and even less about releasing the throttle.
Put her on a balance Ebike and we'd have been +1 on the road casualty list.