In addition to the regular curriculum in HDQM, there are several ways to broaden your experience in the field.
These include the opportunity to do research in one of the research labs in the department. You could also pursue a Minor in Human Development.
Other options are:
Maryland Center for Undergraduate Researchpromotes and facilitates research experiences for undergraduate students http://www.ugresearch.umd.edu/
Graduate Field Committee in Developmental Science