Fusilli is a natural interface developed for end-users to explore and customize the design of a parametric wrist accessory. The natural interface utilizes bare-hand interactions, designed to enable end-users to control the parameters of wrist accessory, and export designs for additive manufacturing. This paper describes the interaction concept and design details of the interface, as well as a preliminary evaluation of this interface against a control interface utilizing sliders to affect the parameters. This paper concludes with the evaluation results, along with a discussion of the insights uncovered from the user study.