The milk we drink in the morning (a colloidal dispersion), the gel we put into our hair (a polymer network), and the plaque that we try to scrub off our teeth (a biofilm) are all familiar examples of soft or "squishy" materials. Such materials also hold great promise in helping to solve engineering challenges such as water remediation, therapeutic development/delivery, and the development of new coatings, displays, formulations, foods, and biomaterials. This class covers fundamental aspects of the science of soft materials, presented within the context of these challenges, with guest speakers to describe new applications of soft materials.