A lot of children experience wariness when presented with a novel food in toddlerhood – this is a normal developmental stage for many children (some researchers have suggested that this behavior even has an evolutionary advantage). However, figuring out how and which children move beyond this stage of wariness is of interest to our lab, since it is important for the ingestion of a varied diet. Eating and accepting a broad selection of foods is helpful for ensuring good dietary quality, and good diet quality may in turn be associated with some proection from risk of chronic disease. Our “Hummus for Health” study looks at how young children investigate a novel food (in this case a serving of hummus) over a number of exposures (servings). Realted to this aim, we are also generating what we think are the first data on how the microbiome associates not with what children eat, but how.