Hakuna Matata is a food web modeler designed to support middle school students building, predicting and reasoning around food webs as models of ecosystems. Using animals of Africa as examples, students learn about the interaction food web representation and build increasingly complex models. When students make manipulations on species populations, they are tasked with predicting population effects on the other species in their model. Population graphs then reveal the effects, allowing students to confirm their answers. In this way, students learn about the tight coupling between the building and using of interaction food webs with the practice of making population level predictions.