With advances in pattern recognition and multimedia computing, it became possible to analyze human behavior via multimodal sensors, at different time-scales and at different levels of interaction and interpretation. This ability opens up enormous possibilities for multimedia and multimodal interaction, with a potential of endowing the computers with a capacity to attribute meaning to users' attitudes, preferences, personality, social relationships, etc., as well as to understand what people are doing, the activities they have been engaged in, their routines and lifestyles. Re-defining the relationship between the computer and the interacting human, moving the computer from a passive observer role to a socially active participant role and enabling it to drive different kinds of interaction has implications across multiple domains. The HBU workshop aims to see where this change is taking us, and to inspect developments in areas where smarter computers that can sense human behavior have great potential to revolutionize the application domain. This workshop will gather researchers dealing with the problem of modeling human behavior under its multiple facets (display of complex social and relational behaviors, recognition of individual or joint actions, personalization, etc.), with the focus topic of behavior analysis and multimedia for children. The HBU Workshops, previously organized as satellite to ICPR, AMI, IROS, ACM Multimedia, ECCV and UBICOMP Conferences, have a unique aspect of fostering cross-pollination of different disciplines, bringing together researchers of mobile and ubiquitous computing, computer vision, multimedia, robotics, HCI, artificial intelligence, pattern recognition, interaction design, ambient intelligence, and psychology. The diversity of human behavior, the richness of multi-modal data that arises from its analysis, and the multitude of applications that demand rapid progress in this area ensure that the HBU Workshops provide a timely and relevant discussion and dissemination platform.