In order to meet the actual needs of tourists in the scenic spots, proper transportation tools for parent-child interaction and amusement in the scenic spots are studied based on the basic shape of the balance car. Under the background of 5G smart media technology, AHP (Analytic Hierarchy Process) and FBS (Function-Behavior-Structure) are combined together for the innovative design research of parent-child interaction balance car, and the actual needs of the users are obtained through the questionnaires. In detail, the specific needs of the users are assigned and sorted by AHP. In terms of program selection, the weight ranking results are introduced into the FBS model. Thus, the calculated and analyzed user need elements are output as specific product design requirements, and the innovative design of the parent-child interactive balance car in the two aspects of the function and structure shared in the scenic spots and the user APP interface design are incubated. The combination of AHP and FBS is feasible and can provide reference for the development of related parent-child interaction products.