We present a new “intertwined” data definition example, the multidimensional array, for How to Design Programs (HtDP). The example has important real-world relevance in many areas of modern computing and thus appeals to a diverse variety of students, yet is straightforward enough to use in lectures and assignments. Best of all, functions dealing with this kind of data can be incorporated into a full programming language, and thus our example complements prior ones and enhances existing ideas. This paper describes our ideas and also presents a first-hand student experience of how they are amenable to and motivated the lessons of HtDP.