Children's ride-on vehicles having a drive assembly that is selectively
configured between a plurality of drive configurations, such as
responsive to user inputs via user input devices, and a ground detection
system that is adapted to detect when at least one of a plurality of
wheels loses contact with the ground surface. The ground detection system
may be adapted to restrict the plurality of drive configurations
responsive thereto. This restriction may be automatic responsive to loss
of contact of the at least one of the plurality of wheels with the ground
surface, and it may be made regardless, or independent, of user inputs
that otherwise would select and/or enable one of the restricted drive
configurations.