Children's ride-on vehicle assemblies having trailing vehicle detection systems

Children's ride-on vehicle assemblies having leading and trailing vehicles that are removably coupled together by a connection apparatus. The leading vehicle is an independently operable ride-on vehicle having a drive assembly that is selectively configured between a plurality of drive configurations, such as responsive to user inputs via user input devices. The assembly further includes a detection system adapted to detect whether or not the connection apparatus is in its coupled configuration and to restrict the plurality of drive configurations responsive thereto. This restriction may be automatic responsive to coupling of the leading and trailing vehicles together, and it may be made regardless of user inputs that otherwise would select and/or enable one of the restricted drive configurations.