Science, Technology, Engineering and Math (STEM) education is one of the most discussed topics among educators today. The current high-tech world requires more scientists and engineers than ever before. Although many strategies have been introduced to motivate students to enter technical fields, additional approaches are needed to continue to attract students. In this paper, the Joint School of Nanoscience and Nanoengineering (JSNN) STEM Outreach Program is described. JSNN uses university resources to promote hands-on STEM demonstrations utilizing both in-house and mobile assets. The in-house program uses an annual open house event ("Gateway to Science") as well as facility tours and STEM videos and for students who are unable to attend an open house, such as Gateway to Science, or take part in a field trip to visit the JSNN facility, "hands-on" science and engineering demonstrations are brought to their schools to encourage a greater focus on STEM disciplines. The part of the JSNN STEM outreach program that visits schools is the Mobile Nanotechnology Education Laboratory, a.k.a. "the Nanobus". The considerations for designing these outreach programs and student responses have been analyzed. The analysis provides insights for continuous improvement to keep the programs vibrant and interesting.