The development of the product had started aiming at a new sports play equipment. This is a proposal of the prototype of “low floor type vehicle.” Now not only for a person impaired waist down but regardless gross motor skill, age or sex, a design project for a universal vehicle (Univehicle) has been taking place. By taking the process of design having users participation in a trial gathering to collect their opinion for further improvement, and publicizing the try. By having a URL “univehicle.net,” a new way to produce a product, a user, in which a designer and a manufacture collaborating together, is being groped now.